It's not mean, he's making money as middle-man, how is that mean?
If you are selling logos for 100$, and I am able to find a guy who is willing to purchase it for 1000, you get your 100$, and I get paid for what I worked for, and that is, finding people on the internet with deep pockets.

@ Froomple, while you wouldn't prefer to 'rob', there's other who would prefer, and making tons of money with it.There's no question of morality, it's not a scam. Decision is made by end buyer, it's his choice, if he's going to buy it for that price. Laziness costs both sides, designer who is offering cheap work, without trying to search himself for those deep pocket people, and those with deep pocket, for cheaper service.
Having knowledge about that is what is you are selling.
Any affiliate is making money on internet with this tactics.
They are selling other people products on their sites, with probably higher price than original.
It's all what affiliate marketing is about.

Same applies for anything. Fiverr, Flippa, etc..