I had a 2-thwart Momentum bucket boat about 15 years ago. At the time it was a reasonably priced hypalon raft with fat tubes. It had Halkey Roberts valves, I think some Momentums also used military screw valves depending on the year.
It had thinner material than most rafts, but it also had a wrapped floor which protected the bottom of the tubes reasonably well. The top of the tubes were prone to punctures from careless handling such as flipping the raft over on the river bank to dump water or people tossing external frame backpacks into it (that incident made for a long day). It was fine for the type of class I-III river I was floating. If you're running big water, or a rocky river with lots of things that could bite a raft you may want to reconsider.
If this is a used outfitter boat you can expect it to be pretty patched up, with lots of wear on the floor. Inflate the chambers separately to check the integrity of the baffles, and if it has a self bailing floor I'd look closely at the I-beams for separation.
Not sure why they stopped making them as they were a decent entry level hypalon boat at the time. This raft has to be at least 10-15 years old, so I wouldn't pony up big $$ for it.