There are a lot of accessories that they sell as well, from Playmats to Sleeves, so it's always worth checking in and seeing if you can pick up some Japan limited items
Gamagotoge AR (#109/086) has delivered the sets most impressive appreciation: 436% growth from 1,490 launch to 7,990 current market value
Hieratic Sky Dragon Overlord of Heliopolis X LIGHT Rank 8 [ Dragon / XyzEffect ] ATK 3000 DEF 2400 2 Level 8 monsters Once per turn, when your opponent activates a card or effect that targets a card(s) on your field, your GY, and/or your banished card(s) (Quick Effect): You can detach 1 material from this card
Then there are the special cards, the variants, alt-arts, secret rares, golds, rainbows, galleries These are the ones the collectors are after
From Father to Son At 2 mana, From Father to Son is a clean, simple vehicle tutor, which is huge if you love vehicles but hate how inconsistent they can feel