Who was the contractor, I work in the commercial side of this business, I may be able to help.
What size unit? Was it a heat pump they were going to install? They are more expensive but more efficient and usually have a longer operation life.
Are the installing new ductwork?
What Brand Unit? In my opinion Trane makes one of the best products out there.
I would get three different bids if I were you. And I would use a company that has good reviews, try Yelp. West Seattle Heating and Air have great reviews and are a small locally owned business.
