Mag-10 only comes in 1 size which is 4.26 fl oz. or 2 weeks of their recommended dose. I am about to do a 2 week cycle of it at double the recommended dose (starting monday), and I think most people would double up on it so it is really only a 1 week supply for someone like me.
Also, I think max-results.net's price is $60 which is the lowest I have seen it. Rember though, if you buy it from biotest directly they have a 30 day guarentee, so if it doesn't work you can get your money back. I bought it from them direct for the first cycle, if it works I'm going to do another cycle and buy if from max-results.net. It is more expensive to buy from biotest (3 bottles for $200), but there is less risk.
Duff