Grass Energy 123/130

The Base printing at $26.72, across the 24 priced Grass Energy cards in Pokemon. This one is $1.61.

It has more than doubled: up 388% in twelve months, from $0.33 to $1.61.

47 of the 130 priced printings in Diamond & Pearl share the Common rarity, and this is one of them.

Yes. It is up 96% over the last 90 days and 388% over the last year. The market price today is $1.61.

24 priced printings across Pokemon, from $0.18 for the Evolutions printing to $26.72 for the Base one.

Yes. The cheapest listing is $0.40 against a market price of $1.61, a gap of 4.0x. Market is what copies have been selling for; low is what the cheapest seller is asking now.