If I trade in my ds and psp games along with the 2 consoles, will I have enough for a 3DS and Nintendogs + Cat?

Ok, me and my boyfriend are very interested in buying 2 3DS, 1 for me, 1 for him. But anyways, i have 15 games, 12 DS games, 1 gameboy advanced game, and 2 psp games. I also have the 2 consoles (PSP and DSi) and I was wondering about if i traded all of that in if i would be able to get a 3DS Aqua Blue, and Nintendogs + Cats Boston Terrier Edition. Please tell me what u think! :))) i will be going to Gamestop thursday cause my grandfather is headed up that way. THANKS!