They're made by the boatload, each time by a different, lowest bidding factory in China. It's a shot in the dark. If you stumble upon a good one, but two and keep one as a backup.
If you plan to mount a few prints per year, work by hand. You may lose a few prints.
If you plan to mount a few tens of prints per years, buy a cheap press. You'll probably make up the cost of the press in media that is not trashed by bad hand mounting.
If you're in production, buy a good, heat assisted press in the $4K+ range. Make sure there is a good stock of replacement parts warehoused in your home country.
Get a press that is wider than your media by at least 3 or 4 inches. It's kinda dicey to get a 24" by 72" pano through the ubiquitous 25 presses on ebay. But it can be done, I'm just too lazy to build the kind of straight edge guide that should be sticking out the front.
I ruined my 39" press buy running a piece Dibond with a rather minor but sharp burr on the edge. The tiny cut grew rapidly in a very big one. One must treat roller presses with care.
My 25" press that has been sitting idle for about a year has started to develop longitudinal cracks in both rollers. Must be the humidity, or maybe the use of cheap-as-dirt materials in manufacturing. The rollers are the Achilles heals of these things.
I used a large, high quality press a few years ago. I have to say a real, professional grade, motor operated press is miles ahead of any of the cheap, manually cranked press I have ever seen or used. And a footswitch makes it a one-man operation. If I bought one again, it would have a heated top roller and at least one tensioned laminate feed roller