Doctor's trade value is too high...

Since the rates weren't eased this time, I think the Professor's Research being a 2:1 trade is probably not going to change... It's limited time and generally used with two copies due to its high versatility, so there will always be demand. Also, even if a different art version of Professor's Research comes out, I feel the popularity won't change because it's Professor Oak.

Yeah, they're in almost every deck with 2 copies. However, they're cards that warp deck building alongside Monster Ball, so their rate might drop if they get restricted or nerfed in the future.