Used HVAC parts can be purchased online through specialty parts resellers such as HVAC Parts Outlet or through online auction sites such as eBay or Bid-On-Equipment. Amazon also features used parts sold through its Amazon Marketplace program, though availability is limited based on the individual seller's inventory.
The HVAC Parts Outlet website allows users to browse a wide selection of different parts in several ways, such as by part type, manufacturer or by conducting a keyword search. Each listing contains a picture of the part, a description of its condition and the specific part number issues by the manufacturer. Users are also able to purchase installation assistance through one of the site's licensed partners.
Auction sites like eBay and Bid-On-Equipment feature listings from both private sellers and small businesses. In an auction model, items are given a starting sale price and a sale duration, during which time users are able to place bids on the item in an attempt to have the highest bid when the sale ends. Some sites also allow sellers to place a separate price on items that allows customers to bypass the entire auction process and buy the item outright. Some auction sites also charge users for each bid placed, so it is important to check the specific policies of each site before a user places a bid.