In most cases, misprints are located and destroyed or are subject to substituted quality controls before they can reach the streets, so the amount of available misprints in the market is very limited
While Gagagigo the risen has no effect, just like most other cards in the line, it's easier to summon than its dark normal monster counterpart Gogiga Gagagigo, since it requires three level 4 monsters as Xyz materials rather than two unspecific tributes
If you hit an average of one land in every three top cards, you're going to break even
Also, thanks to its increased toughness, Vivi should be able to hold its own in plenty of combat encounters
However previously rare cards both for its place in tournament history and its limited printing have been valued at tens of thousands of US dollars, if not millions
Tibalt's Trickery can target a spell that can't be countered