Are you looking to buy it or have already bought it? I paid $1000 for my 1982 300TD with 190K miles about a year ago, but it had a slipping tranny and a broken driver seat spring. The engine blowby also seems excessive. The wagons sell for a premium over the sedans and some claim that 1985 was their best year (mainly due to the better tranny). If all the major systems are in good condition and it is in good cosmetic condition with no rust, $6000 would not be excessive. I have seen them sell for more on eBay. Be sure to have someone check it out before you buy it.