HID Headlights can cost $1500 ....
This is a little pointless. HIDs are not a common option on gen II (One of mine has them, and the other does not.), HIDs can be replaced by halogen.
You can very easily find a gen II without HIDs. If you do find one with them, I will gladly trade you my 04's halogens for them.
Gen I headlamps are in the $240 range (new) if you can find them, less on e-bay.
Gen II halogen headlamps are in the $500 range (new), if you can find them, less on e-bay.
Gen II HIDs are indeed $1500 new, if you can find them, they are often much less on e-bay.
Lets play your game a minute. Pick a random part that you might one day need. I pick the gen I hydraulic fan system. It's not available new at all now. When it was, it was somewhere close to $4,000. Of course, e-bay for used ones is considerably less, but there is greater risk of the used parts being worn out. One option is to convert to the gen II electric fan...
Anyway, it doesn't bother me if you want to stay with gen I, and it shouldn't bother me that your specific examples of why seem so invalid.