Example: Refurbished from a store...or from a site like Ebay / Craigslist? Or do you prefer to purchase new stuff only. Have you ever gotten ripped off? I often get used stuff for friends and my job. Ebay seems to be a good place to find PC mice. I try to get lots of 12 for under $30. Monitors I normally get from Craigs List (to avoid shipping charges) Just picked up 2 really good 22 in wide monitors for $15 each. Keyboards I normally get new ($12 can get you a good one on Amazon) Towers (refurbished) from sites like Walmart or Amazon...seem to work well. I tend not to buy towers off of sites like Craigs List...because I don't want to get burned by something someone may have experimented on. (Did purchase a tower off of Craigs List once...It worked...but made weird annoying noises).