Tell the shop to lick your balls. Unless they are replacing EVERY part of your a/c system with new Honda parts, then ... thats all i have to say.

You can look on ebay for a reman. a/c compressor, which is usually around 150. Or you can post a WTB ad in the classifieds of the forums. Either way, the only thing you will need a shop to do is charge the a/c freon after you are done installing the compressor. That should cost no more than 100 I would say.