Without looking at the car yet I am concerned mainly about the AC. What are the chances the system is working and what are my options if not. I've Know about the
conversion kit and wondering if anyone has experience. Any idea of the cost for the work assuming all the existing parts are working properly?

This is not something I would attempt but am considering as the seller of the 92 says the car is in great shape.
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89 240 wagon, 94 940, 300K, 94 940, 141K

If the seller didn't offer to show you maintenance receipts the car's condition is unknown. They may have just waited till things break to repair them. Your best choice it to find a mechanic who currently works on 240's or did. Consider paying him for a couple hours to check, run tests, and test drive the car. He will know what to look for and you will have the results to negotiate a good price.

You could also ask this member, Dave Barton, what to check. He posts his repairs and advice on late models regularly. He also has a couple of websites dedicated to 240's.

If the seller didn't offer to show you maintenance receipts the car's condition is unknown. They may have just waited till things break to repair them. Your best choice it to find a mechanic who currently works on 240's or did. Consider paying him for a couple hours to check, run tests, and test drive the car. He will know what to look for and you will have the results to negotiate a good price.

You could also ask this member, Dave Barton, what to check. He posts his repairs and advice on late models regularly. He also has a couple of websites dedicated to 240's.

I have a 1989 with mint body and low mileage.About a year ago I spent about 1500 US to replace the compressor and hoses. On the hoses,be sure to replace the originals with high barrier hoses. The normal hoses that came with the car will leak the 234 that your car probably was converted to. Freon very expensive in USA. Since you don't know whether the compressor works or not, it would probably be wise to replace it as well as the hoses.If the body is mint and you can buy it for a reasonable price, the AC upgrade would be a plus. In my case, it was cheaper than a divorce!