I'm going to go by your username your probably 19/20 years old.
Unless you have some mechanical knowledge, deep pockets, and a second car I wouldn't.
The EJ motors randomly blow up, leaving you with $3k-$4k repair bills for a new shortblock and a rebuild. Leaving you probably a month without a car.
Turbo's can fail, and when they do, you better hope they don't grenade themselves and send metal shavings into your engine. General maintenance will be higher, a N/A legacy will need a oil change maybe every 4k-6k miles. These car's have to have it done pretty much every 3k-3.5k and don't even think about running anything other then synthetic.
Ask a couple members, I'm sure my friend Max Capacity will jump in, he's paid for his car almost 3 times over.
Legacy GTs as they age are turning into a niche car, those who can afford to keep them on the road are, and those are getting fewer and fewer.