So of course I couldn't find anything wrong with it when I looked at it today, so I brought it home. Couldn't even bring myself to barter with the guy, he was so nice and the bike was such a perfect fit.

If anyone is interested, here is the info I have on it so far:

Serial Number: A_3110184
Bars: M Lite 6061 Alloy
Headset: The PIG
Rear hub: Shimano STX RC
Front hub: System 2
Front derailleur: Deore LX
Rear derailleur: Deore
Crankset: Shimano Hyperdrive-C
Seat: Vetta Transverse TT
Brake levers: Shimano shifter/v-brake combo
Brakes: Tektro V-brakes

Not sure what year yet, but I'm pretty sure it's around a 94, given the Tree Amigos decal on the seatpost...

I'm thinking I'm going to keep it a dedicated mountain bike, but then again who knows. The front derailleur isn't connected because the PO converted it to V-brakes, utilizing the cable stops. So I'm either going to have to locate a clamp-on cable stop or set it up as a 1x8.