Roland R-5 For Sale. We got this unit without a power supply, so we borrowed our tech's R5 power supply to test it with. You will need to find or build your own power supply as this sale does not include one. When testing it, we noticed the plus and minus buttons need to be pushed harder than the other buttons in order to engage, but they do work. We would normally pay our tech to fix things like this, but due to the low value of this item versus the high cost of repair, we are selling it the way it is. It's likely that other units out there have similar issues, only sellers either didn't disclose this information or just don't notice. We are very thorough here. Everything else was tested and appears to be working as it should.