Not sure, have you phoned a few?? On topic (sort of), how much is a new condensor for a cerbera and are they fairly simple to change out as I think that's where my leak is
I'd say that was fair, especially as they're travelling to you. I hope that's all that's wrong - from my experience with AC, the new gas can leak out and you're faced with a bill of £X00 to find and fix the real problem...