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As your question is a little open-ended, I’ll avoid going too in-depth, but I’ll try to give an overview based on my own experience running E-commerce stores with multiple dropship and non-dropship suppliers.

The first question you need to ask yourself are your reasons for wanting multiple suppliers rather than just one. This will give you an overall criteria to assess whether or not you need a particular supplier in your network, because more relationships = more time and resource to manage which inevitably equals more cost. The main reasons are

1) Availability of new Products
New suppliers will allow you to broaden your product offering. I would tend to avoid any suppliers that carry a very narrow range of SKUs (product lines). The exception is suppliers that sell a unique product that will sell significant units at a volume, or an average amount of units at high margins.

2) Redundancy
In the event a supplier of a key product runs out of stock, increases their prices or fails to maintain the service quality you’ve agreed upon, it’s useful to have alternative options. If anything, it gives you confidence to negotiate on price without fear of losing everything if it all goes wrong.

3) Cross country / state routing
Having multiple suppliers set up in all of your key countries will greatly reduce shipping costs and time-to-customer, which in turn increases customer loyalty.

Finding Suppliers and Original Products

From experience, the best dropship suppliers are those that don’t advertise the fact they dropship. In fact, the suppliers who will usually put the phone down on anyone who asks that question will usually mean you’re onto something, as the barriers to entry for that particular niche are likely to be high.

Also, original products don’t have to be products that aren’t sold anywhere else, just products that aren’t widely available to resellers. This means getting to know your niche, finding out what’s in demand, and making contacts amongst sellers.

Here are a few places I’ve found successful:

- Trade Shows and Exhibitions.
As well as being a tax deductible business trip (the kind of ‘business trip’ where the nights are more important than the days!), Exhibitions and Trade Shows are packed with new product ideas, and manufacturers and retailers keen to make more sales. Try to find overseas exhibitions; as well as the benefit of seeing a new country under the guise of work, you’re also likely to find products that currently aren’t being sold in your home-territory, giving you a significant head start. Frankfurt in Germany is the exhibition capital in Europe and well worth visiting if you’re based in the US and there’s a relevant exhibition taking place.

- Niche / Industry Print Magazines.
Assuming the newspaper and print magazine industry still exists when you read this, the classifieds at the back of these publications usually feature small independent manufacturers with good products and poor marketing skills.

- Private Advertisers on related blogs and forums.
Use a tool like Whatrunswhere or Adbeat to find advertisers in your niche who produce a product. Many will already have an affiliate program in place, but will often also consider a dropship arrangement if you speak to the right person.

Technology
There are platforms such as Hybris or Saleswarp that can do clever things with supplier management and inventory load balancing, but I’m assuming you’re looking for an overview at this stage and nothing too in-depth.

Personally, I’ve always started with a one size fits all solution (basic supplier chain management built into the ecommerce platform) and as the business grows I’d usually move to something more custom to manage things like

- Location based order routing
- Inventory on hand management
- Delivery tracking and reporting
- Supplier Payments

The cost to have something similar developed will be relatively expensive, so it’s worth starting lean and using something off the shelf in the early days.

Agreements
I could talk about SLAs and aiming to establish exclusivity or territory rights, but apart from being expensive to setup, it wouldn’t be realistic to expect this until you have some reputation in your industry.

In the early days, it’s simply a matter of selling in volume, paying for your goods on time and not being a jerk when you need something done. Taking your supplier’s sales rep out to lunch once in a while never did any harm either!

Setting up a reliable network of suppliers for dropshipping requires a few essential steps. First, it's crucial to research and partner with suppliers who can consistently meet your quality and delivery expectations. Once you've identified potential suppliers, establish clear agreements on product standards, shipping times, and return policies to create a smooth, repeatable process.

On the infrastructure side, you'll need an organized system to manage orders, track inventory, and communicate efficiently with your suppliers. Many dropshippers use e-commerce platforms that integrate with supplier management tools, enabling real-time updates and automating order processing. Also, consider minimizing your initial infrastructure investment by using cloud-based solutions that scale as your business grows. Here’s a great article that dives deeper into strategies to streamline infrastructure costs: https://www.cleveroad.com/blog/how-to-reduce-it-infrastructure-costs/.