It largely comes down to the deck you're playing and how useful those cards are in the current meta, but there's almost certainly going to be a home for this in the format
3, Target still has preorders of the Pokmon TCG: First Partner Illustration Collection available for $15.99, and for when those go out of stock, Amazon is selling units for $69.99 still under its market price on TCGplayer
They will not overwrite effects that modify power or toughness without setting it (whether from a static ability, counters, or a resolved spell or ability), nor will they overwrite effects that set power and toughness which come into existence after they resolve
Modern Pokmon products still sell, but they dont stay scarce long enough to support the old reseller playbook
What affects the value of Reshiram
What isnt guesswork, however, is that Shrouded Fable does have some nice promo products (such as the Kingdra EX box), as well as some decent ETBs