Keeping the car....

 

stock ur car is worth 12.5-13.5 + the skunk2 exhaust u can pick up for 250 used, obx header 250 new, and ap2 v1 wheels are worth 600 bucks max...

ur tct is prolly gonna go out pretty soon, the obx header is known to make you lose power mid range, there is no reason for you to have an act heavy duty clutch in there especially with how little power your making, and lastly your car is worth 14k max with all the mods... most of the mods you listed are stuff you can't even change about the car like tranny, and clutch and fly wheel... are you gonna swap the tranny out for the buyer if they want a cheaper price?? i doubt it since you basically have to pull the motor to get to the top two bolts.... be realistic and take a loss on the car and sell it for what its really worth