$900 seems ridiculous.
They are all high priced.. Powerblocks new are like $1200.00, those Canadian ones in Coops video are like $2400.00.
For my budget, I would pay the $900.00 no problem, if I were to setup a small home-gym without much room.
Those, a rack, a barbell w/ plates is all thats needed. (All of that other stuff you find used/cheap).
So overall, not really a high price (total) for lifetime use. (Compared to the yearly 500.00 gym membership).
I have no mortgage, car payments, credit-cards or any debt at all, so spending that on fitness would not be unreasonable to me..