im gna go with a strong disagree on this one. just because someone powder-coats their wheels another color or modifies their lights doesnt remotely denote that they dont do the maintenance. i performed mods on my car the day i bought it. ive done all my maintenance and never cheaped out on parts or quality repairs. add to that many owners lightly modify their cars with quality (big dollar) mods....that doesnt mean maintenance was neglected. hell, my car is garage stored under a cover these days - and pending repairs & maintenance will be done properly as always...
matter of fact, most these cars are modded then returned to stock for the sale (thus the part-out threads) so the points made here are really meaningless if you think it through.....more points regarding taste rather than the reliability of the car...
im in SoCal where i see most E60s rolling on HRE wheels with Dinan/Essienmen/Meistershaft exhaust, ceramic tint, BBKs, customized headlights & taillights...etc. none of these things are cheap and the cars are oft well-maintained.
just because you keep your car bone stock doesnt mean you are more inclined to do more maintenance lol!
OP, boil it down to being prepared to address the rod bearings within ur purchase budget - if you find a car with it already done....youre gonna pay almost an equal mark-up anyways.
OP - Please allow me to offer some advice, when it comes to buying specialty cars (M cars, AMG cars, etc).
They tend to attract two types of owners. Exhibit A (your posted car with stickers everywhere) and the unmodded, unmolested mature-adult owned specimens.
You're worried about cars that "have had the rod bearings changed and vanos solenoids replaced" - may I ask why? Also, why is that more important than what should be pretty obvious to most, a car with tons of stickers and painted wheels etc etc. Brother, you should be RUNNING from those ones. They were used, abused, and put away wet. Nothing does a better job of screaming that than a bunch of (tacky) mods on a luxury four door sedan.
You've bought into so much of the paranoia about rod bearings without the actual ownership experience, that you want a car with a fresh set installed. Ok, I'll play devils advocate. Who exactly is going to sell a car with recent engine-open service like that?? Unless the install was botched (very very likely), or there is STILL metal showing up, or they spun one and band-aided it all back together to pawn off on the next noob. Think about it analytically. Vanos solenoids either fail or they don't. No one PM's these, also the same with rod bearings.
I came from the E39 M5 crowd, where they were all ticking time bombs and people drove in fear. I didn't change my bearings, I ENJOYED THE CAR instead, sold it at 130K miles, and it's still out there running fine with 175k+ on the clock. The S85's were supposed to be far less prone to rod bearing issues, so I moved on to one of those. Now, all of a sudden, these are ticking time bombs yet company after company has cropped up to sell you new and improved sets of rod bearings. Coincidental huh?
The point I'm trying to make is this. What due diligence you think you are doing by limiting your search to post-rod bearing install and vanos swapped cars is not a very valid expenditure of your time. You want a good, reliable car with no hidden gotcha's. So, Instead, look for:
Cars that ARE NOT modded (especially hideously as previously posted)
Cars that have 2-3 owners TOPS.
Cars with stacks of service paperwork. Parts, labor, oil receipts, etc etc.
Cars with real-life mileage. 10-12k per year is pretty average. Lower is obviously nice, and higher is OK, again assuming the above three points.
If major service like rod bearings were performed, where was it done? Better be at BMW.. or come with some sort of 3 year / 36Kplus mile warranty. I wouldn't trust MOST of the shops out there to do this right, especially not on "just a customer's car". No. Way.
With high performance cars, WHO you buy them for is by far the most important aspect of the search. Good luck, and your budget in the mid 20's should get you what you're looking for. Just be patient and don't buy junk. People buy beat up garbage, join the forum, then complain that a bearing spun or the car is unreliable. Garbage in is garbage out...