I picked up a provari earlier this year on the classifieds dirt cheap. It’s more of a souvenir than anything. There towards the end of the stock up frenzy I decided to buy four or five dna mods thinking that I may never be able to get them again. I use my Thelema dna100c every day since I got it and it works perfectly. I also picked up a couple Therion and other dna mods on the classifieds.I'm with @hittman . I wish I'd bought more of the better quality devices when I could instead of lots of cheapo stuff.
Some of the cheap stuff is well designed and cool but the good stuff passes the test of time. I'm currently vaping a 2019 BBV BB and a Mixx with a Dvarw (clone). Always reliable and feel smooth in the hand.
One thing I wish I'd bought is a ProVari but they went out of business about a year after I started vaping and now it's probably too late