HVAC Condenser Replacement

[Joshua Feit]

I have a noisy outdoor HVAC unit at one of my rentals -- called a larger company who said my condenser was broken. Their quote:

$2300 for a new condenser / all related installation

$3000 for a new outdoor unit all in / all related installation

Is there any reason not to buy a compressor online (looks like about $650 for the part) and have a general repair contractor install it for me? Or is there a reason to hire a bigger company at a high price point for a job like this?

Thanks for your help!