While price is always an important factor, I think a better question would be "What is a good storage solution within my budget
If that 5 power Shimmer Dragon has Fireshrieker attached to give it double-strike and a Blackblade Reforged attached to give it +1/+1 for each land you control, there's a good chance someone's going to be dealt lethal commander damage
Clean, raw copies are becoming increasingly difficult to source as master set collectors snap them up
No one has even heard rumors of paldean fates promo cards coming so Im going to say officially no gamestop stamped promos for that set
They arent numbered or counted in the main set and only come as standard cards not foil
"Blue-Eyes Toon Dragon", "Manga Ryu-Ran", "Toon Mermaid" and "Toon Summoned Skull" have a grammar error stating "If a face-up "Toon" monster is on your opponent's side of the field, your must select the "Toon" monster as an attack target