Take a look:
http://www.fumotovalve.com/
I have 3 of these with over 440,000 combined miles with no problems, and one is over 20 years old. If anyone is interested in a group buy, I will have firmer information in 2-3 days about prices. All BMW engines have the same thread, and all seem to require the adaptor for a recessed drain hole (for my 3.0 X3 at least). I don't think the nipple is necessary, but I'll see what the price difference is. The nipple allows you to attach a tube and presumable allows "cleaner" oil drainage with less splash. Not a big deal to me, but some X5 folks with the oil access cover might like this. Oil changes are a snap with this valve. Online retail price is $23 w/o nipple, $26 with nipple, and adaptor is $6. So, either $29 or $32 before the group discount and shipping. Let me know if interested. I'll put up possible prices on 1/23 or 1/24.
Jon