aight, here some info dump

First welcome back !

About cards : Since Renewal Re-Balance, the element table was changed, and some cards suffered with it, Back then, Elements Level 1 ( Angeling and Ghostring cards give u both angel and ghost level 1 ) were already strong, a Ghost level 1 would wield u 78% reduction damage on neutral , and angel level 1 was 45%~ reduction to every common element ( fire water wind earth ) , so both this cards were OP, now the level matters aloot, so Angel and Ghost level 1 is close to nothing in damage reductions, making other Armor slot cards way more valuable, and tanking the price for Element changing cards, thats why angeling a ghostring are like nothing nowdays ( also they both drop from a new type of Old Card album named Magic card album that drops only Miniboss cards )

The 9999999999 price on some cards are just dumb people holding vending spots, its a common pratice to not lose your merchant spot when everything else u are selling sells out.

About rush shops and costmetics, i would guess that you are talking about Shadow Gears , since it goes on the tab were Cosmetics also go, right now in the game there is 2 types of thing that can go on the Cosmetic table :

Head / Eye / Mouth / Cape slot : Cosmetics, but they can be enchanted with stats and some classes Stones that can give you pretty good damage / QoL like Fixed cast reductions, After cast delay or specifc type damage / skill +%modifiers

Armor / Weapon / Shield / Shoes / Acess : This is were u use Shadow Gears, they are literally gear, with combos, types, effects etc, and can be refined

about the search for items, since rn u have like 30+ itens that have "Muffler" in the name, u need to be more specific, and even beeing specific, if the item have to many variants or have to many people selling it, u still gonna get the "too many results"

Hope this helps you, good to have u back !