The heart of the modern misprint world is on Facebook, in groups like MtGRarities, Major Misprints, and Misprint & Oddities B/S/T
Secret rares are heavier than a normal card, so lighter code cards are put into the packs to cancel out the weight difference
You want a purchase that feels fun, sensible, and low risk
I am using data from MTG Goldfish (check it out, it's an awesome site: ) I use the Revised version, because its the go-to version for people buying into Legacy
But Xyris wants to throw reservations out for a much more unbound and fast-paced deck
If it drops off toward bulk, Ill probably pick up a bunch in order to hedge against future Modern or even Legacy formats where this becomes a useful piece of sideboard tech