Wow, 4 full posts and no one has called it a cult gun...yet.

Those of us who own Jets love them. In fact, while it really is a K22 a lot of people don't consider it as one. I'm going to guess that Jet owners are more fanatical than K22 owners. Kind of the keepers of the faith.
David did a pretty good job above with the prices and things. Lets never forget the box. My gawd do people want them and they're willing to pay big bucks to get one. Back about 20 years ago I found a beauty at a gun show. It had some flaws, but was exactly what I wanted. One of the flaws was it only had 5 inserts. I found a guy selling them at a gun show a few years later and not only did he have individual ones, he offered to toss one in if I bought a set of 6! Kind of like a dream come true. Except I was younger and even more stupid then.
So I tried the inserts and then put them away. I was going to try the 22lr cylinder but forgot to bring along a screwdriver that fit so I put it away, too. It got me down to just the gun. It makes friends, quick. I was shooting in a gravel pit when a friend drove up. Being a good guy, I asked him if he'd like to shoot it. He looked at the tiny 22 caliber bore and told me it was too small. But I told him to shoot it one time and still say that. So being open to such a dare, he did. I'd given him my muffs and I still had my plugs in my ear. Yes, you might want to wear both.
He fired it one time and started grinning. We about blew his wifes eardrums out. She's not the brightest and didn't even cover her ears. She told him if he's going to shoot that thing again, she was leaving. He smiled even more and shot it again. What he liked more than the sound was the fact he was hitting out at 100 yards. Just 2 liter soft drink bottles and old milk jugs, but it was offhand, too. If you're around one being shot, beg them to delay until dark. Then fire it one time. Its got a lot in common with a professional flash on a camera. I thought my M19 with Blue Dot was bad, but like so many things, the Jet does better.
I was really shocked last month when GF made a derogatory comment about them being useless. What it tells me is he's never owned one or shot one.
What DC says above is the truth about people wanting and needing 6 inserts and the extra cylinder. You'll never use them and will feel inadequate if you don't have them. I guess one of the weak spots in all this is the ammo. Recently its down in price. Maybe the only caliber that is. Even worse, I didn't buy any. I would buy .222 bullets or empty brass if I saw any.
My gun came to me at $700. It was too much back 20 + years ago, except that it did have 10 full boxes of ammo. That was worth $750 at the time so I got a bargain. I'm thinking Jet owners mature over time. Its only because we scrounge so much ammo we realize we'll never shoot it all. Back over the years it didn't take a lot to make me a happy camper at a gun show. Just finding bullets or brass was great. Even better was occasionally finding a partial box of ammo with the empties in the plastic.
One of my better days was at the Louisville show when poster "Memphis" showed up with a present. I'd not done anything special for him, but he handed over a 100 + loaded rounds plus some extra stuff. Even a plastic loading box, full. That was great. Hey Roger, if you still read Jet stuff, thanks again. Like an elephant, I never forget!
And now I've got to go dig in my piles of stuff. My jet supplies have never been transferred out of the cardboard boxes and into the ammo cans. It might be where the stack of .222 bullets are hiding.
Dave Keith is using an interesting solution to the bullet problem. He's got access to a machine shop and has made himself a die to squeeze .223 or .224 bullets down to .222. He bribes his grandson to run the bullets through it. I asked how hard it was to move .001 or .002 and he said its about like pulling the lever with no bullet in it. Guess that's not a lot of metal to move on a small diameter bullet. It might make Hornet bullets be of some value. We have posters here who say they prefer .223 or .224 bullets, but I'm not one of them. It messes with the brass and shows a bulge where the bullet has pushed it out.
Rule of life: Guard your Jet brass.