Hey, looking to sell my GTS Black RaceChip USA tune. I'm thinking somewhere around $300 as it has been barely used. I bought about 9 weeks ago for $750 direct from the manufacturer. The high price is due to me also buying the app to go along with the tune module. You will be able to access and use the app when the product arrives. Look at the user manual for instructions on how to set it up. Thank you for taking interest and please contact me by PM!