Got this groupon voucher for regas aircond. The guy did a test and said that my aircond compressor has gone so he won\'t refill the gas unless is repairs. He has quoted me 500 for a 2nd hand unit and condenser plus labour. I\'m a bit pissed by it as the money I paid for the voucher cannot go towards the repairs, apparently he still need to fill the gas etc. is there anyone here that know how to fix it for less than 500? Is the aircond guy trying to rip me off?