I say this if ya like the Subaru go get it, but don't sell the Grand Prix. The Pontiac Brand is no longer being produced and your GP will go up in value as time goes on. If you keep your GP for another five years it will be worth more than it ever was new.
Oldsmobile has been dead for years and you don't see them suddenly being worth something...
2004 Impala LS - got some mods sold!!!
2009 Subaru Impreza WRX STI
NAIOA moderator Still Imp'n, just in a different Imp.