Make your own RFID sniffer using my new RFID sniffer kit. It contains a professional quality circuit board and all components, including a battery. Just add solder!
The kit can be ordered for € 10 (plus shipping) by sending an email to marc at marcboon dot com. Specify the delivery address and I will send instructions for payment and the cost of shipping.
On July 17th 2008 I will host a hands-on soldering workshop at V2 in Rotterdam where you can build your own RFID sniffer on the spot. For more information go to http://v2.nl or http://dewar.nl/toko. This workshop is free (except for materials) and open for everyone.