If you are into buying or selling items at Guild Traders in Elder Scrolls Online, ESO Price Checker is the tool you need. This unofficial application by Andrew Carlton provides you with all the necessary information to make informed decisions about your trades.

The app allows you to check the current market price of items, including the average, lowest, and highest prices. You can also access historical data for the past 14 days to determine if the item's price is rising or crashing. ESO Price Checker also helps you find trends, such as price increases over the weekend or mid-week slumps.

Additionally, the app provides you with the price of all related items with different traits and qualities that are on the current market. You can also track the prices of your favorite items by adding them to your watch list.

Please note that the prices reflected in the app are only for the PC/MAC servers and require an internet connection to search items and retrieve pricing. Overall, ESO Price Checker is a must-have tool for any serious ESO trader.