Servo help

[krockhouse]

I am making a turret and I am looking for servos.  The turret will weigh around 5-7 pounds and so we have been looking for servos that can give out tourque that is twice as much as we would need.  I found these servos and I was wondering what your takes are on them because they seem to be extremely cheaply priced.  Has anyone used these?

http://www.dpcav.com/xcart/product.php?productid=16491&cat=255&page=1

[Pyro]

For that kind of torque, I'd be a bit hesitant with said price tag.  Who knows though, they could end up putting out rated power.