purchase advice 2000 X5 with a few issues

[haye_paul]

Greetings, I am looking at, and will most likely buy, a '00 X5 with 53K, owned by a friend, and wondering its value in this depressed economy where used cars are going cheap?? The car looks very good, inside and out, no accidents, but has not been garaged the past 18 months

It has the following known issues

1) driver window reg sticks down if fully lowered (best place to buy part and approx cost of install from indie)?
2) top windshield seal deteriorated, cracked
3) left turn signals not working (unbelievably bad engineering to access the bulbs from what I can see)?? any advice welcomed
4) service engine soon light on (assume fluid changes but could be more even though it runs fine
5) dead pixel problem instrument cluster, about 35% bad pixels (big expense?)
6) hazing of headlight plastic much worse on left side.

Tires 2 almost new and 2 @ 65%, new fr brake pads, and new battery

I have a cherry 94 325is with 64K for 5 years (20K miles) and have only spent a total of ~ $500 on maintenance including the 60K service I did myself to include water pump, thermostat and housing, all syn fluids (manual trans, dif, eng oil, and brake). Best most reliable car I ever owned for 20K miles

I realize the X5 will cost much much more and am trying to estimate cost of ownership per year for a frugal DIU'er who takes very very good care of vehicles. Will $1500 per year come close?? Any idea how much to bring it back to pristine??

When should the auto trans fluid be changed and can it be done at home? If I pay to have this done what will it cost??

Thanks, I welcome any educated imput,

All the best!