Yes they are.
I went in and asked them to check my printer cartridge, which is probably just clogged, and the manager said no.
Then they offered to sell me a 45 dollar print cartridge and offered me 3 dollars for my used cartridge, which was still full of ink.
I think they are not only assholes, but stupid assholes, because they were not planning on keeping the cartridge for themselves, but they would have sent it off without thinking how much it probably was really worth. Which, according to the internet, is more like $15 and not $45.
CompUSA left that space and was replaced by Staples, basically.