Thanks guys.

I got a quote on a rebuilt one for $400. I called my local Benz repair shop (not the dealership), and they told me they'd let me know tomorrow whether or not they'd put their standard 1yr warranty on it since they didn't know the supplier (who is the guy who actually pointed me to this site).

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I'm not a gearhead. I know nearly nothing about cars...so, please be gentle with the ignorant!

Current:
1985 300SD (300,000 miles)

Former cars (of note):
1966 Mustang
1983 300SD (sold it at 320,000 miles)