Hi Michael and welcome to the forum.
Looks like there are a few points that need addressing in your post, so bare with me and I'll do my best lol
1. Supplier prices the same as eBay - OK, give me a day or two on this one as I'm going to do an entire post on this subject.
2. Suppliers not selling wholesale - Our directory includes both Wholesalers and Dropshippers, as well as Liquidators, so you have to pick which ones suit your business model.
3. Not knowing they were in the directory - Despite what they have said on the phone, the only way into the SaleHoo directory is by application and then undergoing and passing a verification process.
4. Dropshipping delivery charges - That's an area where you have to be careful with Dropshippers, you need to make sure their shipping charges are viable or that will ultimately impact on you.
Let me get this other post up over the next day or two and I'll link you to that. I think that will answer any of the other points.