These were a few years ago from my Amazon days (’501s/’502s/C8s/’98s).
I went on at length about the race-to-the-bottom death-spiral of quality. All my ’502s I bought when they were still good, using either real Crees or at least good LB clones. Cheap drivers (resistors, no regulation), but decent emitters, albeit on the cool side, ’though not Angry Blue. Even the switches were really good, no flicker or anything on my daily-driver.
Alas, it was the same for C8s, too, when I started getting ’em. Good quality.
Later, about in a 1-2yr span, quality went down the toilet. Never got more ’502s as I was hip-deep in ’em, but as far as C8s, that’s when they started getting cheaper and cheaper. Crappy featherweight Al pills, plastic reflectors, cheap switches, E-sized emitters that may have been clones of LB clones, would barely put out 3-digit lumens, more like 70-80, ’though concentrated into a pencil-beam. Really bad. Hell, even to use as a host, the body would be lightweight, obviously thinner and lighter than earlier.
Anyway, my first C8s were great, later ones crap. I complained to Amazon and/or the seller (forgot which), and got a partial refund for the crap ones.
So nowadays, I wouldn’t risk getting any generic light from Amazon, period.
You’d probably have a much better chance getting something decent from FT, especially if listed as “genuine Ultrafire”(!).