912 MHz RF Transceiver (Set of 2)
Because these were discontinued long enough ago, there is limited information available. I do have 2 sets available. Limited information available in the description below, but you could also check the Parallax forums. These used to sell for $59.99 each. Sold here as a set for $50.00 for a good cause.
EB500 Bluetooth Modules (Set of 2)
I found one set of these classic Bluetooth Adapters originally designed for the BASIC Stamp 2 and having an AppMod header to connect to any development board with the appropriate socket. Not tested, but should be working. See description below for complete details.