Really depends on the condition and any additions it has (or doesn't have). If the battery has leaked that can seriously ruin the motherboard if not completely kill it. The condition of the case and insides makes a difference. The lack of a keyboard and mouse knocks a few bucks off the value. If it has a hard drive, any software on it may matter. Kickstart ROM version might also be a factor.
It will probably sell for enough to make it worth the hassle of ebaying it. As long as you dont expect some unreasonable price it will almost certainly sell. Look at what others on ebay sold for and you'll see... then start bidding real low and watch the bids come in.
