i've used my esc cos for 5 years as a daily car and its never missed a beat,so you can use a cossie as an everyday car in my experience. I held out for a mint low millage car with air con,i turned down loads of good ones because they didn't have air con as i was determined to have air con......since i've owned my esc cos i must have used the air con about 10 times So i'd say f**k the air con and find a minter and if it has air con then thats a bonus.