Can you use the estim machines they sell cheap at walgreens?

I saw a small machine for under 20 dollars, is it worth buying it or will it just barely work?

Only way to tell is to buy it and try it.

If you don't like it bring it back, make up any excuse - it wasn't powerful enough so the doc Rx a tens my insurance is getting for me through their preferred supplier...

With electro conductive lube is key...

I bought a cheap $20 unit, and have a lot of fun with it. I'd love to try a full power unit to see if the difference is worth it though.