Well, my AC hasn't been functioning properly since last November, but I didn't try to fix it until now. I went to Lexus dealer for a checkup, and they told me that the AC compressor is going bad, and so on, and they tried to convince me to put down at least $2500 on it to get it fixed.
So I started gathering all the ac parts myself. I went on ebay and got the ac compressor for $250, and a few other things for cheap, and now that at this ac repair place. Initially, they told me everything is working well, and then a couple hours later, they phoned me and told me that my evaporator is leaking. I don't have a car, so I can't really get there to see what's going on. All I can say is that I believe the ac repair place more than I do with Lexus dealer.
I don't mind a used one, and that's why I wonder if anyone knows a good source to acquire those parts.