Yesterday I bought a dyson dc25 on Facebook for $20. I went to high school with the guy, so I knew he wouldn't sell me anything that he wouldn't guarantee. He didn't know much about, but said he had other vacuums to replace. I brought it home, sure enough the roller didn't work. It looked brand new and didn't have any cloggs or blockages. I Googled the problem. Within 5 mins, I unplugged, let it sit for a few minutes, plugged back in. Stepped on the red lever in the back, reclined it down to the floor, turned on power button, then pressed the roller button for 5 seconds. It's worked like a champ ever since. Got me an expensive vacuum cleaner for $20 and a 2 minute YouTube video. Karma gave me a little payback today lol