Choosing a wholesaler is the decision that most shapes a dropshipping project, and it is almost always made by looking at the least important thing: the size of the catalog. A huge catalog is useless if the margins don’t work, shipping takes too long, or orders have to be typed in one by one. These are the criteria that actually decide.
Real margin, not percentage
The first number any wholesaler shows is the discount off MSRP. That number tells you almost nothing, because real margin is calculated after subtracting shipping, payment gateway fees, return costs, and the cost of acquiring that customer.
Take five representative products from their catalog, calculate the full margin of each one, and see whether the result supports your ad spend. If it doesn’t, no amount of volume will fix that.
Delivery times and carriers
In dropshipping, you don’t control the delivery time, but the customer holds you responsible for it. Before signing, ask for the real average lead time — not the promised one — and which carriers they use.
A wholesaler that delivers within 24-48 hours in Spain lets you compete. One that takes a week forces you to compete on price alone, which is the worst possible position.
- Real average preparation time, not just transit time.
- Available carriers and whether you can choose.
- What happens with orders placed on weekends or holidays.
- Whether they ship to the Canary Islands, Balearic Islands, Ceuta and Melilla, and at what cost.
Returns: the fine print that hurts the most
This is what people ask about least and what causes the most problems. The law requires you to accept returns from your customer; the wholesaler is not required to accept them from you under the same conditions.
If the supplier does not accept returns or charges to process them, every customer who changes their mind is a direct loss. With tight margins, a normal return rate can wipe out all the profit in a category.
Catalog quality, not quantity
Twenty thousand SKUs sound great in a presentation and are a problem in a store. What matters is what comes with each SKU:
| Images | Sufficient resolution, clean background, and multiple views. A catalog with one small photo per product forces you to take your own photos. |
| Descriptions | If they come as plain technical text, you’ll have to rewrite them. Count that work from the start. |
| Attributes | Size, color, dimensions, and material structured. Without them, you can’t build proper filters or variations. |
| Updates | How often the feed changes. A catalog updated once a week is useless for fast-moving products. |
| EAN and SKUs | Necessary if you also plan to sell on marketplaces or sync with an ERP. |
Automation: the question almost nobody asks in time
Every wholesaler says automation is possible. What you need to ask is exactly what is automated and what requirements it has.
Importing the catalog and syncing stock is usually available to everyone. Automatic order sending is something else: many wholesalers grant it only to approved accounts, case by case. If your business plan assumes you won’t have to type in orders, confirm that before setting anything up.
An example of how it is set up
To make it concrete: with OcioStock, a Spanish leisure and gift wholesaler, the full connection with WooCommerce imports the catalog via feed, keeps stock and prices synchronized according to your margin rules, and —if your account has that access enabled— sends each order automatically. You can see how it works on the OcioStock dropshipping in WooCommerce page.
- Is the catalog feed available from signup?
- How often can you check stock?
- Is order sending automatic for any customer, or do you have to request it?
- Is there a connector for your platform, or does it need to be developed?
The questions worth asking before signing
Almost all the important information about a wholesaler is not on their website: it is in the conversation with the sales rep. These are the questions that reveal the most and that few people ask:
- “What is the real average preparation time?” Not the promised one. Ask for the average over the last few months.
- “Who pays the return shipping?” If the answer is “the customer,” in practice that means you do.
- “Is automatic order sending available from signup?” Many only grant it to approved accounts. It is the question that changes your operations the most.
- “How often is the feed stock updated?” If the feed is generated once a day, syncing every hour is pointless.
- “Can I see the feed before signing up?” A wholesaler that won’t show it usually has a weak catalog in images or attributes.
Warning signs
There are signs that, while not disqualifying on their own, are worth taking seriously when several appear together:
They require a high signup fee before showing anything. Paying to access a catalog you haven’t been able to evaluate means you take all the risk.
The catalog has no EAN. Without barcodes, you shut yourself out of marketplaces and make any future ERP integration harder.
There is no programmatic way to send orders. If the only option is a web panel or email, your operation has a low ceiling and you’ll hit it sooner than you think.
The images are small or watermarked. It means you’ll have to take your own photos, and that completely changes the initial investment calculation.
How many wholesalers you should have
Starting with one and doing it well is more profitable than splitting yourself across three. Each supplier has its own feed format, its own way of receiving orders, and its own update rhythm, so every additional one multiplies integration and maintenance work.
The second supplier makes sense when the first one is already working and you want to cover a product family it doesn’t have, or when you want to stop depending on a single source for your best-selling products. Before that, it is dispersion.
Frequently asked questions
Is a Spanish wholesaler better than an international one?
For selling in Spain, the local one almost always wins on delivery time and return handling, which are the two factors that most affect the reputation of a new store.
Can I work with several wholesalers at once?
Yes, and it is often advisable so you don’t depend on just one. The complication is operational: each one has its own feed, format, and way of receiving orders, so it multiplies integration work.
How many SKUs should I import at the beginning?
Far fewer than they offer you. Start with the product families you will actually promote; a huge catalog with no traffic only makes the store slow and hard to maintain.
What happens if the wholesaler runs out of stock halfway through an order?
It depends on their policy, and it’s a question you need to ask before starting. The minimum acceptable is that stock is synced often enough for that case to be rare.
Related guides
Conclusion
The right wholesaler is not the one with the most products, but the one whose margins can support your acquisition costs, whose lead times don’t create incidents, and whose operations can be automated end to end. Check those three points with numbers before signing, and explicitly ask about automatic order sending: it is the part that most affects your day-to-day work and the one that is most often discovered too late.
