Seems like a lot of folks are putting their Primaluna amps for sale...

Just my opinion, but yes, "a lot" according to what I've been seeing the past 2 months, not just the snapshot of what's on there at this particular moment. Most of what I've been seeing are Dialogue Premiums; amps, monos, and integrateds. If you look at sales history, on multiple sights, it seemed people tried them and were moving on. I was only looking for some feedback, not really interested in 'snark'. 

I was tempted with PL gear. UA, for a few years, had NOS discontinued models under $1,000. UA advertises heavily in the stereo rags. I'm sure they are fine...I just decided to look elsewhere

It's probably to upgrade in some instances. They get good reviews, but they aren't perfect according to user reviews; they are built to a price after all, and I have personally always thought that they were ugly for tube gear. 
Admittedly, I have never heard any of it, and as another poster says, it may just be to get some needed cash. Anyway, they sell a lot of them, so there are a lot of owners out there.

Probably just a reflection of good market share for Primaluna and Audiogon being a good place to sell tube gear for top dollar.

would agree with Tablejockey. great time to buy stuff. Am doing same, looking for good deals. 0nce covid is over, economy will come back strong for many. Lots of pent up demand right now.

There may be a few sellers trying to  raise rent cash,  but think that is more exception than the norm. If you look at historical data off hifishark, long before covid hit, there was a high frequency of regular primaluna sales. Its easy to see why some want to move up. Where else can you get a real tube amp new at that price? I know I bought my first PL amp on a lark.

Have owned VAC, Cary, CJ, VTL and many pieces of MAC gear, and have to admit PL makes it super easy and effortless to run tube gear on a daily basis.