If you don't see water now, maybe it was just the AC condensation. Usually, when a pump leaks, it doesn't stop.
As far as the price, that seems really high, but I don't know where you live. I would recommend that you make sure the coolant is actually leaking before spending that much money.
If you see a leak again, rub your finger in it and then rub that into another finger. If it is only water, it will dry quickly. If it is coolant, it will be slippery and not evaporate.
Let me know what you find.
Wednesday, July 31st, 2013 AT 3:29 PM