Some of the reverse holos from Unseen Forces and Team Rocket Returns look really nice!! And they’re pretty cheap
Also can’t go wrong with the CoL holo energies!
These japanese exclusives are nice
Some of the non-secret rare exclusives come in the theme decks.
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Chinese energies 
There is some epic and awesome Japanese exclusive ex / dp-p and bw era energies. From tournament’s, there is one with spotlights under the energies. I’ve gone completely blank atm, but that general era has some great promo energies in Japan.
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bought mine like $80 for the set on ebay 39,40,41. I’m see someone selling a set on yahoo japan, they are pretty rare to find.