Was in the industry for years, was 1 of eBays top sellers for this niche until they changed the rules so that you had to input credit card information for age verification and then sales nearly hit the floor.
TIP: Avoid unexperienced sellers on places like AliBaba. These need to be marked as medical goods to get through the gates unlike most items. Lots of people have started off by buying a couple thousand dollars worth of adult items and then get a notice that they were destroyed by customs.
One of my favorite distributors is http://www.eailv.com (Eailv) - a lot of their packaging isn't designed for English speaking markets, but they have the cheapest prices for the highest quality items. I made a lot of money off of their "Sex in the City" line of toys.