Even within the rules of fan-art I listed above: people buying it know theyre buying a proxy, a replicated card (at least, assuming its not someone trying to hock a proxy off as being authentic) the fact that it does use authentic artwork is tricky, and maybe the most grey of greys involved proxies dont interfere with the rights-holders from selling cards because, well, the rights-holders dont get ANY money from the secondary market to begin with
"An Interview with Atsushi Nagashima About New Tag Team Pokmon-GX"
Three mana to have your lands tap for any mana is a decent rate, and W&R's -2 is top notch
At the moment, its a bit hard to see this card slide down lower than $40 if it does go down that far
Somehow, even in a 100-card singleton format, theres never enough room for all the cool spells you want to include, plus the necessary lands to make the deck work