About & accuracy
Used Cars accuracy
Historical archive validation, not a live record.
Read how the model works →What this is
GTRotation tracks the Legend Cars and Used Cars dealers in Gran Turismo 7. Their inventories change daily. Cars rotate semi-randomly, sometimes returning within a month, sometimes vanishing for half a year. This site records each appearance, computes the average interval, and estimates a probable return window for every tracked car.
How the forecast works
For each car, a gap shorter than 14 days is read as one interrupted stay rather than a new rotation. That is our choice, not a rule of the game, explained in full on the methodology page. The typical return is then estimated with a robust historical median. Return windows are calibrated from past errors, while the score measures how mature the current wait is against previous cycles.
Estimates are not promised dates. Polyphony's selection algorithm is opaque; we report likelihoods, not guarantees.
Data
Legend dealer changes are checked against GT7Info and GTDB. Used Cars follow the GT7Info daily archive. Each dealer has its own history and forecast model. Data is stored in Supabase, with saved fallback snapshots updated on every sync. Unusual records are flagged for review instead of being silently deleted. Price movement is computed only from historical prices belonging to the same car.
Author
Built and maintained by Besian Shala (started at 15, still going). See more of my work and projects on my portfolio at besianshala.com. No affiliation with Polyphony Digital, Sony, Hagerty or GTDB. The trademarks belong to their respective owners. This is a fan tracker.