Almost everyone, including me, underrated Hangarback Walker when it was first previewed, and how good it ended up being is now influencing my rating for Walking Ballista
Gym Leader Challenge is a popular example and is one of many listed in the Alternative Play Handbook linked below
Cards that draw/add multiple cards, like Professor's Research, will also not cause you to exceed 10 cards, instead only drawing/adding cards up to a full hand (so playing Professor's Research with a full hand, for example, will only draw 1 card instead of 2)
Poor goblins
First edition cards are perfect examples of some of the best vintage cards you can find, with the Base Set, Neo Destiny, and Neo Revelation representing some of the most valuable Pokemon cards ever
Round trip taxi packages follow 250 km/day billing