tx900
 

i am looking to sell my father-in-laws bike and I do believe it's a 1978 tx900. any way to make sure on it and what is a fair price?

Welcome to the forums. The biggest factors in the price are going to be the cosmetic and mechanical condition. If you post pictures, so these can be assessed, members will chime in with valuations.

The serial number on the bottom bracket will confirm the year and model. Vintage Trek Bicycle Frame Serial Numbers, bike

And these queries should go here: Classic and Vintage Bicycles: Whats it Worth? Appraisals and Inquiries - Bike Forums

And if it is a ~62 cm frame, let me know. :)

I used the serial no. to confirm that a bike I purchased last year was indeed a TX900, http://www.bikeforums.net/classic-vi...-tx-900-a.html

The pics in that thread will also help you confirm that you have a TX 900.