pokemon sun and moon cards booster box Guardians Rising Pack 10 Pokemon USA GX and Lunala Pokemon Japanese GG End Booster

They are not as universally recognized as Base Set or as mythologized as Neo Destiny, but the combination of Gym Leader nostalgia, competitive history, and genuinely beautiful artwork has kept the top cards from both sets trading at impressive premiums that sometimes surprise collectors who are not closely following the vintage market

$484.99 90 Days Low $757.00 Daily Low $822.80 Market Price Mega Gengar ex (284/217) Crashing Through the $1,000 Barrier Mega Gengar ex (284/217) is another Ascended Heroes SIR and this card has certainly come out on top of the entire Mega Evolution era

As far as calculating the expected value of foils yourself, it's exactly the same as calculating the expected value of non-foils, except they are worth significantly more and you get significantly fewer per box

Market price $0.32 Based on the latest market prices tracked on TCG Stacked