The bicycle is an entry level mountain bike from the mid 90,s. Id guess maybe $400 new. The Alivio components and steel handlebar give it away.
Nice looking lightweight aluminum frame, and thankfully it still has an original rigid fork as a lot of bikes from this era have heavy poorly or non functioning pogo stick suspension forks (because the elastomers are rock hard or the seals are gone along with the oil and no replacement parts.
The bar ends are upside down. Check the rims to see if they are concave from heavy brake usage .
bike looks like its in pretty good shape though. —