Here is a thread with all the distributors. I've been slacking in updating the most efficient models each company is offering, but the companies the links still point to the official distributors.
Current List of Competitive Hardware - January 2020Apart from that if you know what you are looking for, this board is for sales. You might find someone selling the gear used that you want/need. My only suggestion is use escrow, OgNAsty above has handled this in trades for me before.