Isomergames via Amazon offers Prime members Sonic and All-Stars Racing Transformed Bonus Edition for PlayStation 3 for $23.99 with free shipping. (Non-members can spend $25 or more to get free shipping; otherwise it adds $4.98.) That's $4 under our February mention and the lowest total price we could find by $16.

Update: The price has increased to $24.47 with free shipping.