Not exactly sure the answer to that question.
You can buy a frame from Harbor Frieght. So I guess you could just buy the plates, and the controller. However what I ordered from Extracted Colorado was:
The frame - They design a frame like Harbor freight, but the jack is pushing from under the plates, so if the pump ever blows you wont get oil in your rosin.
The controller - I was told it's UL listed, but I think the contacts are the only thing UL listed. Don't quote me on that.
The plates - I am using 3x6 bags for my plates. I press 30-40 grams per flower press and can fit around 100g of kief, but I haven't figured out how to seal the bag with that big of a press. I do 40 grams no problem.
200 flower bags - once again, 3x6. Then I order more from Rosin Evolution . com .
The price keeps changing, because I think I might have been the very first press. However I think it's around 2500$ for everything I listed and delivery. Might have gone up. Been seeing a lot of other presses in person, and I like my Hercules press the best.
@The Terps