Avidex

Avidex is a free, donation-supported pricing guide for piston general aviation aircraft. Type in an N-number and it gives you a value with a confidence range, based on comparable aircraft that are actually for sale.

It checks about 25 marketplaces and brokers every day, so it can also show how long planes sit on the market and how their asking prices change. Each aircraft’s page pulls in its FAA registry record, accident history and airworthiness directives. It isn’t open to the public yet. The scrapers and valuation engine are working, and the market-trend pages are still filling in as the nightly job collects history.