As of 2015, the easiest place to find Heathkit amplifiers is on peer-to-peer trading and auction sites. Music-oriented trading websites such as Reverb and general auction sites such as eBay also offer Heathkit amplifiers.
Several classic Heathkit amplifiers from the 1950s and 1960s can be found on Reverb. When purchasing products on Reverb, users can pay with major credit cards or PayPal. Prospective buyers have the option to make an offer to the seller if they think the selling price is too high. A variety of sellers on eBay also offer classic Heathkit amplifiers as well as parts.
Amazon.com also sells products related to Heathkit amplifiers, such as manuals, reproductions of build instructions and classic Heathkit retail store catalogs.