I have a HANS LY257 model electro-acupuncture/TENS machine for sale.
It is lightweight and easily portable, has input for two leads, and operates in continuous, dense-disperse and burst modes. Requires a 9V battery (not included). The machine is in great condition, and has electrodes for both electro-acupuncture and TENS use (no pads for TENS - these can be purchased from acupuncture suppliers like Helio Supply Co).
This machine retails for around $360, asking $200. For more info please email email@example.com, or ph 0413 340 894.