Interestingly enough, Cyber Twin Dragon had far more competitive play back then due to its ability to attack twice, but nevertheless, Cyber End Dragon has to be in the top three most iconic GX cards and easily earns its nearly $1,000 price
Pokemon ex Team Rocket Returns Booster Packs (Tyranitar and Mewtwo Art) Unavailable Mint EX Team Rocket Returns $2,500.00 + shipping + taxes pokejaay 5.0 61 Reviews 148 Sold Product Details Listing is for (2) booster packs
cards just by their rarity, you might miss out on lower-rarity cards that are worth real money on the secondary market
Using "Ash Blossom & Joyous Spring" against "Branded Fusion" enables "Triple Tactics Thrust" to be used, which can Set "Fusion Duplication" from the Deck that can copy "Branded Fusion"'s effect, allowing "Branded Fusion" plays to be used during the opponent's turn instead
These are the two that come to mind for me