I purchased one of these, good price I feel overall, could probably build one for 1/2 or less the cost just like it but I feel its more than a fair price for ready to go out of the box.
http://www.cencalrosin.com/~shop/rosin-press-1-ton/356838/
I wonder where the line is of diminishing returns when it comes to pressure. This is a 1 ton, how much more product can you squeeze out with a 12 ton over a 1 ton I wonder. Could probably without to much trouble buy a harbor freight 20 ton and use these 5 x 3 plates and pid temperature controller on it if I wanted in the future.