Help with a Forest River Cardinal

[Thechap1]

Could someone help me out please? I have located a 2005 Forest River Cardinal 31LX for sale by a private owner. No one answers the phone when I call. The outside appears to be in good shape. It has three slides.

I searched the internet but can't find any information on the unit. I have no idea what a good offer price would be. Nothing is listed on the for sale sign.

Is there anyone familiar with this unit? What is the average selling price for a similiar unit?

Thanks everyone for the help. By the way, this is an awesome site.