I'd do the trade! Get you a part you need for the Blasty and get rid of a R/C that's just collecting dust? Oh yeah! They're probably worth about the same, $$ for $$.
All I know is, I have an old Associated RC10GT sitting in a box in my shed... I'd gladly trade it for something to make one of my Blasty's more of a beast. I think there are Blaster parts sitting on the box, that's how little it gets used. LOL.