Thanks for the feedback. Sounds like it might be on the high-end?
To shed a bit more light, the car does get driven fairly regularly, the owner just has a deep stable.
The real purchase price is the acquisition cost plus the repairs and maintenance (usually some deferred as people don't maintain a car when they are getting ready to sell) over the next 3-6 months. So if a car is at the "high end" but has lots of maintenance done, it may be cheaper in the long run.
Also consider color and options. If it has everything you want (and many people are particular), then it is worth a little more to you.
EAG gets top dollar for their cars, but they go through and do all the maintenance. Recognzing these are just asking prices, but with most of the maintenance done, here are few examples for comparison:
Pre-Owned E39 M5 for sale
Dinan Stage 3 suspension, SS jet coated headers, ESS SC kit w/ 1 range colder NGK's, 92mm pulley, 440 Big Greens, TTFS alpha N tune for meth, RK plenum plates, SBC Endurance Stage 3 Kevlar performance clutch setup, "Jed" lightened DMFW, open brake ducts, TEC cupholder, U.S.(Euro style) tilt/slide armrest, 6k HID fogs, Umnitza bi-xenon flamethrowers w/6k super white low beams, rear fogs, V1/Stealth1, dual head LI, 2.65 diff w/40% lockup/2x dynamic, compact spare, M5 logo trunk carpet, Euro trailer hitch, Mocal oil cooler, ACS type rear spoiler, Rogue custom SSK and tranny mounts, ST 355 BBK (fronts), BP sway bar brackets, Bluetooth retrofit, Speedhut boost gauge (20 psi), Dinan TB's and VS, KB BAP, Howerton/HFS-3 Aquamist WI trunk setup (50/50), with 2nd gauge in rear view mirror, aftermarket trunk mounted sound system integrated into stock unit (amps, crossovers, sub and speakers).......