a/c compressor replace

Somehow my original post got deleted. 1. Driver side power window - makes a grinding/whining noise at certain positions and needs to be manually pushed. Already had to solder the amp/switch. 2. Tach jumps around then eventually stops at max rpm. 3. Have high beams on drivers side headlight...

Hey, I'm considering to buy this 95 p10: Kansas City Craigslist The Ad says that the A/C compressor doesn't work. I plan to negotiate the price based on this factor. What's an estimate price for replacing the compressor? Thanks.