My rule of thumb is a quarter of new, half what a salvage yard charges, or 20% less than completed sales on eBay (not asking price), whichever is less.
eBay seems to run around $200. Can'f find one at a salvage yard. Wouldn't even think about asking what Cessna would charge because I'd be demoralized for days.
So, $150 plus actual cost of shipping if I have to send it to you. $100 if you were standing in front of me with cash in hand (which is close to what I have in it).
