Some online auction sites sell all sorts of items, while others are highly specialized. Some of the larger online auction sites, like eBay, have additional separate auction sites for certain items. One such example is eBay Motors for vehicle auctions. A number of online discount stores, like overstock.com, also have auctions of all kinds of clearance merchandise, from cameras to rugs.

To assess whether an online auction site is reliable, take the time to familiarize yourself with the site and take an auction tutorial if offered. Most reputable auction sites allow bidders to return auctioned items within a specified time period if they are not satisfied. Better auction sites also have readily available customer service. However, even if a site has good business practices, individual sellers may not. Do not do business with an online seller who cannot be contacted, or who offers a better deal via email. Find out what shipping costs may be involved, and how you are expected to pay for them. Before buying an item, always research its quoted value and make sure you are getting your moneys worth.

Signs that a seller is providing full information include a complete description of the item being auctioned, photographs and a willingness to answer any questions a potential bidder may have. Sellers are also susceptible to payment-related fraud, and should always check that a buyers payment or escrow service is genuine before agreeing to accept payment through it.

Once you are ready to bid on an item, put in a bid and stick to it. Maintain copies of all correspondence regarding your bid in case there are any disputes later. Payment is usually more secure through an online payment or escrow service; never provide a credit card number to an individual seller. Your local Better Business Bureau can provide information on legitimate payment and escrow services.