How can I sell my husbands motorcycle?

Okay, so we live down here in Texas, and my husband had a 2005 Kawasaki Ninja ZX-10R that he traded in about 2 months ago for a 2008 Kawasaki Ninja ZX-14 and I want him to get rid of it! You see, we were trying to sell his first bike to get out of the payment, and then he kind of went behind my back and traded in his old bike for his new one. So now we both agreed that it was his mistake to do that, but I don't know what I need to do in order to sell it! I'm afraid we are going to be stuck in the payment because its a brand new bike, but no one is going to pay us what they could pay a bike shop for the same bike. Any advice? I don't know if we could sell it back to the place we bought it from, either way I know we're going to lose money on it.