I offered to buy a peice of artwork three and a half months ago from my roommate who is an artist. The price of the said peice was agreed upon to be worth 400$. I have technically paid 300$ (200$ cash over a two month period, and a computer zip drive, valued at 180$, but was nice so I made it a 100$). My roommate is moving out, and wants 400$ more, saying the peice was 600$, and not remebering the other 100$ I had given her. Everyone I have talked to says not to go through with the deal, due to the shady nature of the transaction, and because of the pressure her boyfriend is putting on her to do this. What rights do I have in this matter? This is a verbal agreement gone bad, and no one can for sure say what was agreed upon.