Update: I originally left a 1-star review (below), but the owner, Dave, takes great pride in his business and followed up with me quickly to make sure that my AC system is working properly. He said that he would send a different team out to the house to re-inspect the system and ensure that everything is working properly. I appreciate the follow up and dedication to customer service.
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Called Legacy to check out an 18 year old A/C unit that had not had problems previously. Called on Saturday and left message during business hours and a woman called back later and left a follow up message. Called again Monday and earliest appointment was Wednesday.
After determining that there was a leak in the freon lines without running any tests for leaks (technician stated that it must have a leak because the freon was low), technician stated that my options were to refill freon and hope it holds, run a leak test (he recommended against it because he said it could cause more leaks?), or replace the entire AC system (of course they would probably prefer that).
I asked if he could use a sealant in case of a tiny leak and technician said it wouldn't work- his explanation was not convincing.
Overall, based on my discussion with the technician, I felt like these guys were trying to take advantage of the fact that it is a rental property and I am not available to be there in person in order to upsell a brand new AC system.
Finally, after being quoted $100 for the repair over the phone, the final bill was $125.