might as well get some die and test the system out, bet the leak is at the accumulator/dryer ... iirc the part is under $100
get a vacuum pump from eastwood company so you can pump the system down at about $50 or ebay for cheaper and get the R-134A and oil at wal-mart and some cheap gages from autozone for about $50 and you can repair the system yourself
but fyi, I just had the dryer replaced at a dealer and it ran me near $600, new dryer was about $150, $100 in R-134A, etc
