Because ultrabooks 

*that go into these things*

Shameless... 

Almost looks like a Gamecube

^ produced by Sony. 

@ARikozuM turns out they had a deal all along and never stopped the nInTenDO pLAyStaTIOn

Yes, you can. Capitalism allows you to do so, though I would look into distributorship. 

If you're asking me if I think it's worth reselling, then no. 

You could make a nicer, and functional, wooden, acrylic, or even stamped alum case for less. I'd say about $50-70 dollars of material and maybe two to seven hours each. 

@ARikozuM The PSU is like $50 too, the board with the Thunderbolt controller can’t be that much more expensive. I bet they make more than $100 from selling one of these enclosures.