Price is per unit if 4 or more are purchased--otherwise $10 each. We have 10+ Units Available. Some are Sylvania, some are Princeston, all function very well. These units will work on any computer (PC) made between 1996 and 2009. These units all worked when put in storage and are in excellent condition. They were only used for 2-3 years and all had screensavers so there is no phosphorus burn on any of them. Also have anti glare screens for $2 each that really make a big difference. For more info or to make appointment please email as per this ad or call 208.941.5813 Thanks! Location: Boise, ID it's NOT ok to contact this poster with services or other commercial interests idaho