If i get a ps3 60gb that can play ps2 games?

May be...

and upgrade the hard drive will my ps3 be able to play ps2 games still

Backwards compatibility has nothing to do with the hard drive. It's in the PS3 itself, so yes.

Yes. It runs ps2 games natively via emotion drive. Every PS3 after it wont run ps2 games as well. The ones right after the 60gB emulate PS2 and have slow games. The new ones cant play ps2 games at all. Make sure that it is the very first 60GB, not a new one with a replaced smaller hard drive.

but they dont sell 60 gig ps3s now

yes