[Vwdiesel] M Benz 300D ?

[William J Toensing]

Here in Grass Valley/Nevada City, CA, our local radio station runs a "swap shop' in the afternoon where listeners can call in with things for sale.
One listener called in with a 1985 M Benz 300 STD with a turbo that needs replacement. Said car had 300,000 miles. No price listed, only best offer. I have not called the party or looked at the car. Just wondering what the price of a new or rebuild turbo would be? How much work would be involved for a DIY shade tree mechanic to replace the turbo? Would it be cheaper, & practical to find a non turbo exhaust manifold & install? No price was listed, only best offer,  but wondering whether to offer $200 or even take it for free, which sometimes happens? It's not a VW but I know some of you know about Mercedes diesels too.