Setting price limits in shops and the tp hasn't, as far as I can see, stopped anyone who's determined to do so from scamming people. Or at least trying to.
Along with all the very good ideas here, another thing I think many of us are aware of is the almost contact false inflation lately. Seems every week there's another item that is suddenly "ub" when in fact it's just a few people buying up an item to try to scam people.
Then there's the inflation that the site itself causes with avatars and kad feeding. Last week heart shaped neggs (I need one for my gallery) were 400k - and I started saving toward one. This week they're at a million. Apparently it's now a kad food! Grrrr. And the horrible inflation caused by the last war with the supporters being asked for the same items. Codestones, for example, went up dramatically. That affected many people adversely.
Galleries - yes, that we can now have separate galleries is wonderful. I know I'd been writing in for the last couple of years asking for such a thing. However, not everyone wants, is willing to or can afford to start up again with the cost of shop/gallery size increases. Like, my old gallery (now long gone) held over 300 items. Might not seem big to some, but to me it was insane just paying for 5 extra spaces. So, I don't think it would be fair to suddenly say to people who've had galleries forever that they have to move it all to the new gallery option. Yes it can be annoying when you're searching the wiz, but ... there's more inflation if people have to put out large amounts of np, then have a shop that's pretty much empty if they aren't restockers/resellers.
Shapu, my idea of limiting the number of high rarity items per day was actually global. But reading your post, I can see where that could be a very bad thing. Maybe one specific item per store per day? Like the infamous t-tear, elemental vial, draik eggs. I still think more restocks/more rareties stocking on a regular basis would be a good thing overall. Not everyone has the millions needed to buy 1 item.
Now, if you would like to rs me a few valentines/heart things at a good price, I'd love to talk to you
I honestly don't see how increasing either the amount of times we can send a score for a game (even 4 times instead of 3) or equalizing the np/points scored ratio for some of the games where the payout really is close to not worth playing a certain game would cause more inflation. Yes, there would probably be more np floating around the site, but there would be people with more np to be able to actually buy something. So the np would keep flowing through the site, either to the main shops, user shops/tp/auctions.
Economics were never my strong suit though. So, I'm probably completely wrong on the game payouts theory.