one piece cg op-13 booster box carrying on his will TCG [OP-13] (Japanese) – Card Piece and Sabo return as new Leader ca One Piece TCG - Carrying

Are there any excellent ones I omitted

[Main] If there're 6 or fewer total cards in both players' security stacks, by suspending this Tamer, 1 of your [Kudamon] may digivolve into [Kentaurosmon] in the hand for the digivolution cost, ignoring its level

That covers every printed variant reverse holofoils, secret rares, and the special-art chase cards numbered past 101/101

In terms of supportive Spell/Traps, "Interrupted Kaiju Slumber" is a "Dark Hole"-styled board wipe that then summons 2 "Kaiju" monsters from Deck, 1 on each side, and can banish itself from GY to search a "Kaiju", giving it significant value both for "Kaiju"-focused decks and general non-"Kaiju" decks as a staple board wipe

Use websites like Pokmon Price to search the exact cards you own to find past sales of your cards