What and How Much?

A friend of mine gave me these rims when i had my truck, i blew the engine in my truck so i have nothing to put them on. I want to sell them but neither me or my friend knows what they are... All i know about them is the size - its 15 x 8.5 and they have a 5 bolt pattern... if anyone could help by telling me what they are and mabey how much they are worth i would really appreciate it.
http://img153.echo.cx/img153/3307/rim5ad.jpg (http://www.imageshack.us)

the brand of the rims is Ultra. They tend to go for $80 a set these days. They were cheap wheels when they came out and haven't been popular for almost 10 years.