Like most Pokmon cards, the value of Drilbur depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Emerging Powers)
If any piece of the card is missing or print layer torn off, automatic 1 or even get rejected if its substantial
These packs can be spun around, moved up and down, and analysed for bent corners and crinkles (which spawned an all but defunct conspiracy theory among some players), but many have theorised that it doesn't matter at all
Mimicking Man-Eater Bug - 2000/600 "Tch
On the flip side of the same coin, their opponents tend to over-run Bill in other decks, making those decks even worse against Lickitung
Its not just about value here, this card wins hearts on art alone