Hi, I dropship FULL TIME for a living with 60% of my products going through ebay.
Altough there are many people dropshipping on ebay, the key is to find a niche. I sell childrens climbing frames, paddling pools etc. stuff like that, and it does very well. My mark up can be anywhere from 25% to 60%.
Some dropshippers are better than others and this can only be established through trial and error.
The source I use for dropship wholesalers is from here, I cant recommend it highly enough:
http://www.genuine-business-opportunity.com