Well the add gives very limited info looks to be 1990 model. Pretty basic mid level road bike if every thing is in good working order ready to ride $250-350 depending on market and actual condition.
It is a 1989-1990 aluminum Trek 1000, it's entry level model at the time. If the bike is clean, ready to ride, and decent tires, in your neck of the left coast, probably $250-$300. Looks like a 58cm frame, so you should be 5'9-6'1". Check the frame joints for cracks too.
Life is like riding a bicycle. To keep your balance you must keep moving. Albert Einstein
2015 Additions: 2001 Eddy Merckx AX Titanium, 1981 Peugeot PKN10, 1987 Centurion Ironman Expert, Raleigh Super Course MKII, Raleigh DL-1 Tourist, 1985 Miyata Pista, Kestrel KM40, Nobilette, Klein Stage, Schwinn Paramount 50th Anniversary
$200-250 around here. Based on the crank I'm guessing Suntour Edge (?) components. Nothing wrong with them but hard to find parts for. If it was Shimano it would be more desirable IMO.
Why "derailer" is the correct way to spell the gear-change mechanism: sheldonbrown.com/derailer.html
I would agree with the $200-$250. Hard to evaluate with so little info. When was the last time this thing had a tune and lube? I wouldn't pay more than $150 if it has needs.
I do not claim to be a doctor, scientist, genie, bike magician, good looking, or qualified in any way. The contents of my post are opinions and should be taken as such.