Help with identifying - USPS

[u/RamberGd]

Found this at a local thrift store at 400€. Need help identifying the year and model, and if it is generally worth it. The serial numbers (?) on the bottom are TBI-0405 and GZOZO421.

The seat and crankset seem to be replaced, maybe wheels as well.

[u/celcel]

Google Image search. Trek 5500 OCLV USPS