Check out the classifieds at brickboard too:

http://brickboard.com/CLASSADS/

I bought a few bits and pieces that way when I had my 740.

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1992 300D 2.5T
1980 Euro 300D (sadly, sold)
1998 Jetta TDI, 132K "Rudy"
1974 Triumph TR6
1999 Saab 9-5 wagon (wife's)