I've been meaning to update this thread with my latest M5 purchase, so here goes.
Back last May, I was looking around for a nice euro M30-powered 5 series. Couldn't find what I wanted. Charlie Kindel (cek on the board), hooked me up with a former co-worker of his who had a really nice euro-ized M5. About 84K with a Hartge body kit and 17" covered lug Alpina wheels. Chris Kohler called it the "M5 with an identity crisis", which I thought was pretty funny. Long-term ownership by a fellow in Prescott Valley, AZ, who sold it to Charlie's friend in Redmond, WA.
Here's the link to my thread regarding my search, which includes a link to some photos of the car as of the time of sale:
https://www.mye28.com/viewtopic.php?f=14&t=154635
Quality glass-out repaint in 2013 with all exterior trim parts replaced. Seats reupholstered to a high standard. Valve job and new Shrick cams, rebuild AC system, etc., etc. and LOTS of M5-specific spares. Purchased for $60K and had it shipped to Perry. I considered it a fair deal for both parties.
It is a very nice car. However, as seems to be the case with any of these old cars, in spite of the considerable "investment"

by the last 2 owners, the car had some needs - at least to my very particular eye. Since acquiring the car, I've probably spent close to $25K getting it to the point that I am satisfied with it. This includes the very unnecessary expense associated with acquiring 5 16" BBS RS211 wheels, having them refurbed by Ehrlich Wheel Works with new Michelin rubber. Just got those put on the car yesterday and it really looks spectacular.
About to get the windshield replaced with OE glass to (hopefully) put a stop to nagging leaks in the corners of the windshield. Once that is sorted, she should be in pretty good nick.
The car now has about 86.5K miles and is a real pleasure to drive. A real looker, too, in my opinion. I just love these old things.