RFID card game

I want to use RFID for a card game.

I have the following 2 products which i bought a few years ago.

RFID eval shield: https://www.sparkfun.com/products/10406

ID20 with breakout: https://www.sparkfun.com/products/13198

I also have tags to go with them. However for this game i will need 500 reprogrammable tags.

Seems like all the sparkfun 125kHz tags are not programmable.

The 13.56MHz ones are but are more expensive.

I also require adhesive sticker tags. Not sure yet if i can get them for either of these readers.

Anyone here ever used RFID on this scale in a DIY project?

Looking for recommendations on readers and compatible cheap tags.