I Think I’m Getting Old

I'm 57 years old, have owned close to 140 cars, trucks, and motorcycles since the age of 15. I too bought plenty of cars for $100.00 or less, did some trades, and of course parted out and crushed a few cars along the way. I bought a 1970 Dart Custom, 2 door, 318/904, complete, not running for $70.00 in 1991. I had it on the road in 3 weeks, using parts sourced form local wrecking yards, then over the next several years I amassed lots of parts to do a full restomod/restoration on it. Kept that car for 20 years, had a ton of fun with it before selling it. I got a good price for it, but sometimes I wonder why I didn't keep it.
I also bought a 74 Dart Sport 360, triple black car, complete, running and drivable, but with a 318 instead of the 360 for $800.00 around 1997, and traded a couple other cars that I had $150.00 invested in for another triple black Dart Sport 360 that had a rebuilt motor, but no interior. That one was a parts car because of severe rust issues.
I've never owned an E body, could never afford one, but I once bought a 66 New Yorker for $50.00.
Edit: My first car was a 67 Charger, bought for $ 800.00 in 1978, sold for $1000.00 in 1979. The only B body I've ever had, was 15 years old, didn't have a driver's license yet.
I currently have another Dart Sport, this one is a 75, it was originally a /6 car, but had a seized 360 when I got it, paid $800.00 for this one, figured I got a decent buy, it needed a lot of work, I've had it for almost 2 years, got it running this summer, but still need to do a lot of work before it will be reliable, and it will never be a painted show car, just a ratty muscle car, that was always my intention with this one.
I find that the older I get, the less motivation I have.
I also have a 1976 Pontiac Ventura, 38k mile original survivor car, it spends around 350 days a year in the garage, (can only drive one at a time).
I keep an eye on what asking prices are regularly, and most of what I see is out of my price range. Once in a while I look at late model Challengers, but the $$$ are always too high IMO.