What should i ask for my car

I have a 2002 RSX type S with a bolt on greddy turbo kit greddy fuel management and inrichment, Hondata K pro software, Borla turboback exhaust, Ibach pro coilovers shocks and strurs, greddy turbo timer and 18 inch axis TC evo rims with a blue lip that matches my car. It has 50,000 miles and the turbo has been on sense 40,000. As much as I like it I want to get rid of it for a tsx. I'm definately not going to trade it because I'll get ripped off at the dealer of course (they have to make a profit) but I don't want to go past the blue book to much. The blue book is about 18,200 do you think it would be to much if I asked 19 or 20 for it. Also the rims and suspention and brakes are only a month old.