air conditioner problem blows cold then hot until car sits for about 5 hours on 2008 Kia Rondo

After it sits it blows cold again for same time frame. Been diagnosed as a compressor clutch needing to be replaced. Cost $701.00 does this seem reasonable?

Asked by for the 2008 Kia Rondo
The clutch engages the compressor, cools down the cabin to correct temp, clutch turns off. It takes one heck of a beating. Doesn't sound like it went out, sounds like it is going out. I believe at that cost they are selling you a complete air compressor. That cost sounds high, unless you are getting it from a dealer! Goodluck