I think it would be far easier for the original poster to mark as sold or no longer available ?
I don't know if you have or use the Freecycle system in your area but we have it in our area. I use it myself a LOT and with quite a fair success rate when asking for stuff IF you are quick off the mark. I have a good success rate when offering items, Replies are in your inbox in a flash. Some stuff you cannot give away - they go to the tip, (example - old pc monitors, the fat ones). You also get a lot of no shows, so I just contact the next in line.
I found when I first joined that this rule was widely conformed to, but as time has gone by people have got lazy and don't bother to advise that the item has gone. As is stands, when I ask for an item, if I do not receive a reply in 24 hours, I just know it has gone, I move on, and don't feel the need to be told in an extra email in my busy inbox.
As an aside, I have had 5 vacs up to now, missed quite a few, and actually refused 2 cordless ones that were offered to me from Freecycle, if memory serves, including a special edition of a DC01 - don't ask for details as that will all be for another separate post when I have the time to spare and inclination to wright it up.
Have also had success with my cost free wants advert on Gumtree, £10 a piece. Again, please don't ask for details - later when I get time.
Have a good xmas and a prosperous new year