TCG's initial fearsome armies, with an amazing 2500 attack and 2100 defense points, so it's no surprise that a well-cared-for edition commands a hefty amount
What about the battles themselves
Collector numbers 72 through 79 are available in non-foil and traditional foil through March of the Machine Set Boosters and in traditional foil in March of the Machine Collector Boosters
Survival is still decent in a selection of creature heavy midrange decks where you have utility creatures, late game finishers you don't want early and ramp dorks you don't want late
Professor Turo's Scenario is similar, but you can put any Pokemon back into your hand, not just Basic Pokemon, but at the cost of discarding all cards attached
Actually, there was one really unfortunate example It was called Lysandre's Trump Card. People came up with a way to really exploit that card, to ruin the game and make it take a very long time