Well to be quite frank, no one here in the USA is usually allowed to resell flash drives via eBay, and I am assuming that is your main consumer target correct? If you find any at wholesale, you might want to check and double check that they are not fake. Take it from someone who sold flash drives for over 4 years on eBay!
On the other hand, you are always capable of importing non-name brand USB drives from China directly. The only problem is that sometimes they come with fake storage size. In other words, it could say 2GB of size and when over 1GB of storage is placed on it, it will error out. However, if you ask the manufacturer to not send you "upgraded" or flashed models, then you would most likely get a chance to last on eBay selling these drives for a while.
eBay now also knows how to find out if you are selling fake products, specially fake storage, so always be careful!
I can always supply real, non-name brand flash memory for both memory cards, usb drives and mp3/mp4 players... Let me know!