2007 pokemon cards worth money from Pokemon Cards Secret Wonders -

#1 Umbreon VMAX (Alternate Art Secret) Set: Evolving Skies Increase: +$122.71 Current Market Price: $983.57 Moonbreon is riding the same wave as Latias & Latios-GX, though unlike them Moonbreon still hasnt broken its previous high of $1,014.20

You do need a giant, but any changeling will do, and there are plenty of playable giants, like the misnomered titans, for example

Even now, cards from this initial printing in their first-run Secret Rare variant are valued in the hundreds, if you can even track one down

That makes it removal target #1 for everyone, and players run more artifact removal these days, so it doesnt actually stick around that often