I'm glad to see someone trying to make a living at this...but...

...your 'cup' is, as mentioned, WAY overpriced. I can make one of those in about 4 minutes (including texture, uv map, and in .md7 format).

...you can't legaly sell Sonic there. Even if you made it yourself, and call it "Bonic the Small Furry Blue Mammal"...it's still Sonic the Hedgehog. Sonic is a registered TRADEMARK of Sony. Probably copyrighted name. Difference; if it was just copyright they'd send you a letter to stop...with TM, you'll probably get an acutal visit from a lawyer giving you papers informing you where to be for your court appearance.

If you want to continue making models stuff to sell, I *highly* suggest reading up on copyright and trademark laws of the US, Europe, Canada, and other places you might want to sell to and advertise in.