I've always wanted an M5. It seems like the E39 is really starting to appreciate quickly, but they're not in "ye gods!" price range yet like the E28 and E34 have become. I've owned and loved an E39 528i, and always said there was nothing wrong with the car that another 200 hp couldn't fix. Questions:
1) Are there any expensive gotchas that a regular E39 540i doesn't have? I'm aware that I'll need to buy with service records or expect to spend $2k on cooling system and timing chain guides/VANOS/etc/etc. But are there any M5 specific maintenance bits that are super expensive?
2) Along the same lines, are there any NLA mechanical parts? I had been thinking about an E60 M5 as well...until I found out what an engine rebuild would cost.
3) Is it just my perception, or does color really affect the value of these? I can find silver and black for relatively cheap all day long, but anything that stands out (really like Avus and Biarritz blue) seems to add 4-6k with no other changes.
My thought is that if I buy carefully and find something with ~125k miles, I can put 10-12k miles on for a couple of years while I'm paying it off, then either sell it for what I've got in it or just store it away as a sunny day car.