Well I've already replaced the expansion valve, the compressor, and the receiver drier (twice), along with the blower motor regulator I replaced today. I now have a leak from the evaporator, and the lowest quote in the area is $2800 for the replacement from an indie. I only plan to keep the car for one year max and I might sell it in the next few months. If I went ahead and replaced the evaporator, I would have spent the total blue book value on replacing A/C components in the last 9 months.