How to get an RFID?

Good day, esteemed financial aficionado. I'm curious to understand the intricacies of acquiring an RFID tag in today's digital landscape. Could you elaborate on the various avenues one might pursue to secure such a device? Is it a straightforward purchase from a retailer, or does it involve more specialized channels? Additionally, are there any security considerations I should be aware of before making such a purchase? Your insights would be greatly appreciated as I delve deeper into the world of RFID technology.