"Tom Hyslip" writes:

152. How much should I consider the fair market price for one in descent
shape, that is ready to fly?

Start flying to local airports. Look at the bulletin boards and walk
around the ramps, looking at C152s for sale. Call their owners, tell
them you're interested and want to know more...make appointments and
follow up in person.

After a while you'll get a good idea what people are asking for what
quality. You'll know what "fair" is, but it takes some work.