Once per turn, when a Spell/Trap Card(s) is Set on your side of the field (except during the Damage Step): You can Special Summon 1 "Power Tool" Synchro Monster or 1 Level 7 or 8 Dragon-Type Synchro Monster from your Extra Deck
It's a $50 to $200 card, it floods search results, and it even contaminates automated price feeds
This blind assortment includes tins designed after the Level Ball, Love Ball and Quick Ball
If you own a printer, you can print labels and prepare the envelope or box at home
You might wonder why you'd attempt to do something you aren't good at to begin with, but I'd argue that comes up far more often than you might think, especially in solo, and especially if you have specific goals you want to achieve
Pricing too early creates anchoring: the team spends time on the most recognizable cards and neglects repeated or low-liquidity inventory