With the dents, $200-250. If it was in perfect shape, no more than $250, because you can get a new refurb now for $349, with full one year warranty, etc.
Me and a friend make websites and we like to always have the least powerful device of a series. I already have my 1st-generation iPod touch to test iPod touch/iPhone versions.
However, we don't have an iPad. How much is a Wi-Fi only, 16GB iPad 1 worth?