My a/c wasn't working, it blows cold air for a bit after adding refrigerant but it doesn't last long. Figured it wasn't the compressor, must be a leak. I added some refrigerant with ultraviolet dye and found it was leaking through a hose running from the compressor to the condenser, don't think it was leaking anywhere else. I took it to the only shop within a good 30 miles to see if they could change it for me and now I'm hearing I must also replace the receiver drier and expansion valve or risk some sort of contamination. I was quoted near a grand, some $375 in parts and at least another $500 in labor. Was wondering if this seemed normal to anyone? Do you think making a trip to another shop would make much of a difference price-wise? If not, would it be a terribly difficult job to do on one's own?