Analog Devices has introduced a low-cost SDR product, ADALM-PLUTO, expected
to ship by the end of April. The price is $149, but it appears that there
is a $99 introductory offer. Even at $149 I think this is a loss leader.
http://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/adalm-pluto.html#eb-overview
Distributor pages:
https://www.digikey.com/en/product-highlight/a/analog-devices/adalm-pluto
http://www.mouser.com/new/Analog-Devices/adi-adalm-pluto/
325 MHz - 3.8 GHz
20 MHz instantaneous bandwidth
12-bit ADC, DAC
65.2 kSPS to 61.44 MSPS
+/- 25 ppm frequency accuracy
one transmitter, 7 dBm power output
one receiver
female SMA 50 ohm
two antennas included (824-894 and 1710-2170 MHz coverage)
USB 2.0 interface
powered from USB
ADI AD9363 frequency agile transceiver
Xilinx Zynq 7010 FPGA & ARM (Cortex-A9, 667 MHz)
32MB QSPI flash
512MB DDR3L DRAM
runs Linux on Zynq
supports libiio API for use from C, C++, C#, Python
supports GNU Radio w/ source and sink blocks
(also supports MATLAB and Simulink, but who cares)