I bought all of the cards off of CardMarket with the help of a middleman from the UK
It's theoretically possible that, if you were to weigh literally thousands of packs to choose your heavy favorites, and bought hundreds of them, you might get a slightly higher pull rate of rare cards than if you bought the same number of random packs - but I don't recommend it, for two main reasons: Most game stores don't permit you to weigh individual booster packs before buying them - mostly because it takes a long time and holds up the line
It doesnt matter if youre selling rare Pokmon cards or moving bulk lots, sort your collection, sleeve the clean cards, research your comps, and pick the platform that matches your goals
1) Split Cards Still my favorite
it brought $54,070 last November in Beverly Hills, Calf