Originally Posted by jake12tech

Best thing to do since he hasn't got service history on it is to have it for a thorough inspection by a private shop. Better yet, pay the dealer. They will get excited thinking that you are going to give them work so go ahead and take it there. They are the first ones to bear bad news.

Since there isn't service records, you now have to take into consideration that:
1): The tranny hasn't ever been rebuilt possibly and you don't know well it has been serviced even if the current owner took care of it. The guy before him may have beat on it. Reverse is a weak spot on the 722.3/722.4. So is a 2/3 flare and you mine as well rebuild if it gets to any of those points.

2): You don't know if the head gasket has been replaced, and the M104 and M103 was weak on head gaskets. They leaked and around this age and ALL will need them if they haven't had it already.

3): You don't list the year if it is a 1993 300TE, those wiring harnesses were garbage and bio degradable.

4): Make sure the AC works.

I don't mean to make these cars sound like headaches, but this is the typical repairs that occurs with these cars. So if they have been taken care of, there isn't anything better you can buy. If they haven't been take care of and neglected, well you better have deep pockets and patience.