I sold a tan GF Aquila exactly two years ago for $200, overhauled and ready to ride in Michigan. I've sold a fair number of mid level rigid 1990's MTBS such as Bianchi Osprey, Trek 850's, Trek 930's, Rockhoppers, and GF Wahoo right in the $180-$225 range. There is a lot of life left in these bikes and they only require a little patience to sell. Best niche are the 17" and up frame sizes.
The OP's bike looks nice cosmetically, but has it been overhauled?