We sell good, original BMW, used E21 320i 1977-1979 fuel distributor units. The price is $400 plus shipping.
At the time of this writing (fall of 2013) a large BMW aftermarket parts business offers this part for just over $1,500. The dealer price is similar.
Another option is to go remove the part from a help-yourself junkyard, but they’re hard to find and there is a good chance that the part might be bad since this a major reason why these cars die.
We don’t charge a core charge. Some of the vendors add on a core charge. To redeem that, you have to take or send your old part back to where you did the transaction, within a particular span of dates. This seems reasonable — yet often, this ends up being non-viable in practical reality. In such cases, the core charge ends up as simply one more cost.
We could find a used unit on eBay too, for less than what we are pricing ours at, but the vendor’s approach didn’t exactly inspire buyer confidence, is my reaction.
It’s probably safe to say that our used units are price-competitive.