Hahahaha a gucci t shirt? Gucci isn't a t shirt designer. Maybe for a shirt that says "Gucci" on it, but that's just them fucking with you, making you pay money to wear their logo and be a billboard, it's not a design. Christian Audigier, Ed Hardy, Juicy Couture (to some extent, not a fan personally), ENERGIE (fucking awesome), CnC Costume Nationale, Affliction, D&G (though not so much lately)... those are designers that make tees. And you will pay over 100 bucks for any of them.
Tee designers in the 42 dollar range are Obey, Grn Apple Tree (really really cool shirts, look them up), Artful Dodger, Monarchy (actually more the 60-70$ range now), Apartment, Jack Jones... there are lots, but we're not talking Gucci here.
^There, there's a good company for Tee designs in that price range. If you don't think Dumont's is worth 40 bucks, maybe you'll like one of those enough to say it is.