It all depends on if anyone in interested in the domain. Your best bet if your interested in selling in my opinion, is to do a search in google, yahoo etc for the word "Administration" then look at the companies that are bidding for that keyword in adwords etc.... Contact them and ask them if they would be interested in buying it, then see how much they offer you.
Someone on here could say its worth £50 or £5000, but its no good unless you get in contact with someone who wants it. You could put it on domainlore with a reserve.