I paid around $1700.00 for my '78 T140v, needing restoring. While many people dislike the early OIF models, the market is rising for them, as the earlier pre-OIF bikes increase in value.
If the engine turns over and runs, and if the bike is original and fairly complete, I would think that $2500.00 would be a fair price. It's true, however, that a picture would help a lot. Original paint and original parts have lots to do with a final price.
Checking Craigslist and eBay would make sense to me......