If you can keep it on the road. I have a 25 year old car too. I spend more on maintenance than fuel (I only drove it 2000 miles last year) Parts are getting hard to find. There is rust that would be expensive to fix.
I have one that's a little over twice that age. Parts availability, especially in the aftermarket, is still very high for domestic classics, especially those based on the stereotypical design, and I doubt that will change much in the near future.
At twice the age you are pre-computer. In the worst case a metal lathe can make any part (though some of them are very tricky to make). If a computer dies on mine I have no ability to make a new one and odds are the chips haven't been made in 10+ years so good luck finding a replacement (getting software to program will also be hard)
Though none of the parts I've had to replace are computer related. Mechanical parts are much more likely to wear out or rust.
