never owned a malibu but others at my house have, we had 2 and the third one is on its way soon for my aunt.
overall the Mali was a great car, only reason this is her third because she keeps upgrading or going out of the country of 2 years and shes doesnt wanna keep it parked. nice thing about them also they are great when it comes to maintenance almost anyone can fix them if they go wrong and finding parts is very easy.
as for the resale value, nothin keep its value when its new, i strongly and highly recommend buying a used 2010 or even 2011 you can find some pretty good deals out there, someone else lost their money for buying it brand new, and you still have many many years and miles of warranty.
again never owned one myself, but dealt with many of them over the years
just my $0.02
Good luck on your purchase and welcome to GMForum!
2005 Phantom GXP - Stockish