Interestingly enough, many of Mega Evolution's most valuable cards come from Ascended Heroes, with Team Rocket's Mewtwo ex being one of them
The most expensive Team Up cards feature an iconic Latias & Latios artwork as the undisputed crown jewel of the set, but another popular duo features multiple times in the top ten
I love the slight flavor-variation involved in porting a spell from one color to another
Its obviously crazy in +1/+1 counter decks, but I wouldnt be ashamed to play it with no synergies whatsoever
Mistys Psyduck AR : Held value better than most ARs, trading steadily at ~2,000
Price tags for playable or iconic cards may vary, but if the card is professionally cut, fits well in inner sleeves, and looks rad, a 3x or 4x multiplier compared with the normal Aq version is not an unreasonable starting point