I can't even find a slant nose valuation in Hagerty but an 89 930 turbo that's in excellent condition should bring over $250k.
Edit: I just noticed it said at 30% for a factory slant nose
Correct the air cooled 911’s have skyrocketed in value over the last few years. It seems that the ones that are doing extremely well are the TT AWD 993’s. I’ve seen some go for in the 300+.
Pick your poison.