There's a few things that every Omega will need every 80-120k miles:
Coil pack
Crank sensor
Front wishbones
Shocks
HBV
Steering idler
Cam cover gaskets
Add in a timing belt and that's why the Omegas hit banger status with such vigour.
Spending four figures and buying one with 75k miles on it won't prevent the list above from needing doing in fairly short order.
The list above is hardly cost prohibitive relative to the overall costs of running an older executive car such as an Omega, or compared to servicing bills of more modern vehicles, and certainly not a reason alone to sell one.
A bit after 'the horse has bolted', but if owners are / have been keen to keep their Omega running for as long as possible rather than selling and updating for a newer or possibly less appealing car, a bit of foresight and forward planning may have been (or still could be) prudent to buy in the commonly required items when they were easily available from VX when prices were in some cases more reasonable, rather than waiting for items to fail, and then scurying around trying to find the required part.
As I have said previously, I have done this since the 1980's with Triumph parts which were then readily available and offered at ridiculously low prices to clear stock, but now, if available, command extortionate prices. I very rarely have to buy Triumph parts for other sources to keep my 6 Triumphs in good order. Those parts I don't now need are easily sold for prices far greater than I paid. Wind the clock on 30 odd years, and it's the same scenario with the Omega.
I would suggest trying to buy the regularly required GM parts when / if they become available, whether needed at that time or not, if you are serious about keeping your Omega for the foreseeable.....
