Like most Pokmon cards, the value of Dragonite 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 (Silver Tempest)
However, this does look like it might be worth playing in the Black-Red deck, as there is one red Sacrifice effect at Uncommon, two black sacrifice effects at Common, and one at Uncommon, so setting up the sacrifice is actually going to be doable there, making the card a solid playable in a deck that gets its hands on some of those effects
For weekly players, every 13 months or sooner if you see whitening, splits, or cloudy fronts
But a couple of covers that stand out to me right now are Melissa by Mercyful Fate and Red Exposure by Chrome. Ian: Thats a difficult one, I could go on about stuff like this for hours
My playtest version of the card was called Moose and Squirrel (a 3/3 that made a 1/1 creature token) and it was in at least five different files before it was cut