We purchased our cold room second-hand with a new compressor under warranty. The ideal situation may be to deal with a company that sells and repairs air conditioning systems in your area, as after-sales service is very important if your equipment breaks down or is damaged.
An alternative to cooling with a compressor is the CoolBot, which transforms any air conditioner unit (the kind installed in windows) into a cooler that keeps your cold room at a controlled temperature, just as an air compressor would. The CoolBot unit costs a fraction of the price, is easy to install and consumes less electricity than a conventional compressor. We have not tested it ourselves, but the unit was designed by farmers and comes with a satisfaction guarantee. More details are available on the company’s website. CoolBot, 1-888-871-5723. www.storeitcold.com. Also available for sale at Farmer's Friend.