Also just got a couple used, unlocked SCT SF3 3015 units in stock, updated to contain the 5.0 and Ecoboost tunes. $270 shipped!
If looking to save a few bucks, works just the same as a new unit. Just doesn't have the SCT warranty but I stand behind my used units, if any issues just let me know and I will take care of it! ( out of dozens of used units sold, never had to but just so folks know )