Generally, what is this engine worth? It's got over 140,000 miles (not sure of the exact amount at this time), and runs fine. Only problem I've ever had is a TPS code, but I've set the TPS, and still get the same code, but that's it. No smoke on startup or shifting at high revs or anything.

 

check here for details: engine swap thread

 

Maybe more than this, but I bought an s4 N/A engine in running condition for $200. Only had to drive 6 hours there and 6 hours back to get it