I would never buy a car off Ebay. Values often get inflated way behond reason in these bidding wars. Check for local cars through Craigs List that you can have inspected prior to purchase. Also, it is a great idea to check with local independent MB repair shops for customers of theirs who are selling cars. Often times you can get a good repair history on a car like this plus straight info from the mechanic who has serviced it.

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'81 240D 4-Speed 328K (Daily Driver)
'01 Cadillac SLS 135k (currently up for sale)