Do not by a Ford Festiva for $20000. It's a rip-off.
Make sure when you buy a Festiva is a good price in relation to that 88 Monte Carlo.
Given that a quick search on Google says that you can get a Festiva for around $1,700-1,800, I agree, that is a ripoff.
If you think paying $160 for a used previous generation video card, when you can a get a brand new, better performing, current generation video card for the same price is a good idea, then as the saying goes, I've got a bridge to sell you.