Really? I know of alocalprinter.com who is on page one for the search term "printing". I take it the selling capability of a "a" prefix would change if the site was established and producing sales / advertising conversions?
I know the owner of alocalprinter.com, it has awesome rankings in the UK, (and online sales of around $1.5 million per annum) and the "a" prefix is handy in alphabetical listings I'd guess you be talking $millions to buy that site....