Can anybody tell me what would be a fair price to have a new A/C compressor installed on this car? 2000 E320 Wagon

I've been quoted prices from $900 to $ 2000 I want the work done right but at the same time I don't want to be over charged. I can purchase all the parts for around $675.00 but I can't find anyone to install them. I feel like they are running a scam on me.