LOL...silverlea, please stop referring people to me; as far as wheels go I'm not the person to ask! I simply suggested you post in classifieds since you already knew what you wanted.
To answer Felton...the M5 rims do look great on E39s. You are correct that "OEM" means that they are real BMW rims; a full set of these will probably run between $2000 and $3000. Replica rims can be found many places; they look exactly the same, but a full set can be had for around $800. The difference is that the OEM rims are forged, but the replicas are cast. This makes the OEM rims MUCH stronger, lighter, more resisitant to bending, etc. However, many people are happy with the replicas, especially since they're so cheap. Just make sure you don't nail any big potholes, or else you'll be shelling out another $200+ for a new wheel.
Anyone who ever buys used cars online, anyone even THINKING of starting a "Is this deal too good to be true?" thread, anyone who wants to be more educated about protecting themselves must <a href='http://www.carbuyingtips.com/fraud.htm' target='_blank'>read this</a>.
<img src='http://www.3xmk.com/mrogers-files/forums/bmw/bmw_sig_small.jpg' border='0' alt='user posted image' />