Here is an old thread on the same topic:
I had one and with modification it worked OK. I eventually used it on my QT
for awhile, but it developed a leak. I cannot access your link, so I cannot see what they are charging but I would not pay more than $30 for one. I bought mine off E-bay new.
If for anything larger than a 30G tank I would save my money and look into other filtration and a seperate skimmer.