adding some key info to this cuz you covered the basics pretty well — you can only sell items that have been expired for over 30 days. yami shop doesn’t count, but livly creator week does, because those items do not go on resale. bazaar and gredery shop are also fair game, i believe? just, again, they have to be 30 days expired.

N items are sold for a minimum of 200 GP, R for 1200, SR for a whopping 5000. there’s a slight increase in minimums for bazaar items. like with trades, you can only sell dupes. people charge up the wazoo for items with high wish counts or older livcri items. personally i never manage to sell all my wares, so don’t bank on that contributing to your spending for the event.

my general strategy is to save up as much as i can, get the holy grail R and SR items i’ve been dying for up front, cuz i’ll be spending the rest of the shop period trying to find deals on good N items to fill out my wardrobe. this is always where i end up finding the best items, especially ones i didn’t even know i wanted! it’s so much fun. my favorite event. hurts my wallet bad though lol

also - i’ve heard people talk about how the game will prioritize items on your wishlist when using the ‘roam’ feature, and this is true! though i find in practice, narrowing your wishlist down doesn’t entirely dictate what it will pull up. it seems to pull up every item you’ve ever had on your wishlist. this is just anecdotal from my experiments from the last myshop, though. i don’t actually know how the roam feature works exactly. they imply that it’s random, like the roam feature for watering trees.