In march you can get the 64 bit Odroid - c2 for 40.00 which isn't too shabby.
http://linuxgizmos.com/64-bit-odroid-sbc-runs-linux-on-2ghz-quad-core-cortex-a53/The Odroid-C2 will go on sale Mar. 2 and begin shipping on the 4th with pre-installed Ubuntu 16.04. Android 5.1 and other Linux distros are also supported
Specs:
Processor — Amlogic S809 (4x 64-bit Cortex-A53 cores @ 2GHz) with penta-core Mali-450 MP2 GPU (3x fragment/pixel cores plus 2x vertex shader cores)
Memory:
2GB DDR3 @ 912MHz
MicroSD slot UHS-1 @83Mhz with optional 8GB or 16GB UHS-1 card or optional Emmc 4.5 storage up to 64GB
Networking — Gigabit Ethernet port
Other I/O:
4x USB 2.0 host ports
Micro-USB 2.0 device/OTG port with power support
Full-sized HDMI 2.0 out Type-A port (4K/60Hz and audio)
40+7-pin GPIO expansion connector (GPIO/UART/I2S/I2C/ADC)
ADC 10-bit SAR interface (2x channels)
Serial console port
I2S audio bus
Other features — Standard heatsink; LEDs; IR receiver
Power — 5V2A DC input; consumes less than 0.5A in most cases, but can climb to 2A if many passive USB peripherals are attached)
Dimensions — 85 x 56mm (3.4 x 2.2 in.)
Weight — 40 g
Operating system – Ubuntu 16.04 (pre-installed) and Android 5.1 (both based on Linux Kernel 3.14 LTS)