Maybe because the arrows are in rounders?
other reason may be that (i remember reading) the new KEM arrows are only available in bridge size / regular index. Maybe the poker size are going up in price now that they are not being made. Heck if I had inventory of the poker size arrows - i'd raise the price

I have 4 poker size sets... woohoo. I'll never sell them - they are my favorite cards.
but I just ordered another two sets of bridge size/regular index for $21.99x2 + $3 shipping (Salem to Oregon) - thnx mspatton. For this years rafting trip. We'll be using the bridge size during my next rafting trip down the deschutes - now that the other decks are worth something. LOL
I saw KEM arrow poker size / regular index - 1 deck for $31.99 - i might be wrong... but i think that was the price.
maybe other KEM poker size card variations are getting short supply.