That is a good price, but the problem with these no-name knock off Skimmers is that you never know if it's gonna be a great piece of equipment or a piece of crap. You always take a chance and if you go with it then you have to be prepared to have wasted your money. With 'known' products they have been tested and proven by many hobbyists.
I feel that these cheaper products made in China cropping up everywhere are made by some of the very same Companies that make the well known brands. Ultimately these knock off brands are going to force the American Companies to lower their prices. This has happened with almost every product being sold in America now.
I would probably take the risk, but could in no way recommend anyone else do the same. That's a decision you will have to make. Everything seems fine but there is no name to back it up.