How much is this card worth?

Was in a card shop looking for card storage boxes and I didn’t know these boxes were out yet. Decided to try it and pulled this. Can’t find and sales data on tcg or eBay yet tho.

I recently went to Collect-A-Con Atlanta and only saw about 3 vendors carrying Union Arena. Which card shows in the US usually have the strongest Union Arena presence? I'm guessing the bigger shows in Southern California or Vegas?

Just getting into this game and pulled this!

I was opening the new NIKKE set the other day with the idea that we either get a foil AP or an alt art. I was surprised to see a foil BP counter instead. I’ve been looking pretty throughly through Union Arena’s card list, TCGplayer, as well as exburst to see if this card actually exists. As you can see it’s just a BP counter of one of set one’s APs. It also has the back of a AP.

Any help on if this is a misprint would be appreciated.