sorry for chimming in someone's sale thread, but I'd like to add something to that b-stock discussion.
as far as I know, under current US laws, any unit/box that has been at least opened, can not be sold later as a "new" unit, regardless of it's condition.
so:
if someone opens the box to look at the contents, or put the unit on display, or just test it, or whatever... such unit cannot be sold as "new", even if it is sent back to manufacturer that thoroughly inspects it. some use here the term "open box", "demo unit" "cosmetic blemish""reconditioned" (depending what it really is), but nevertheless these are all b-stock units.
of course, if the unit happens to be repaired, even if it's brought back to (like) new condition, it must carry b-stock label too.
please note, that many b-stock units are sold by the manufacturer after bringing them back to like new condition ("refurbished"). but even if it looks/smells/operates 100% like new unit, just because someone ever opened the box (thus possibly but not neccecarly put their hands on it) the unit will have to be sold as b-stock.
to summarize: open box, demo unit, refurbished, cosmetic blemish: are all b-stock units.
it is worth mentioning though, that many consider refurbished (and only refurbished out of all b-stocks) units sold by the manufacturer as a perfect deal. not only the are buying something basicly (like) new at a substancial savings (around 20-25%) but what's more, something that shouldn't break down anytime soon (unlike new units). the thing is that most electronic equip failures happen within relatively short period of time. so buying the refurb unit means getting something that have been tested, completelly retested (think of it like of 100% quality controll) and should be operational for the years to come.
my $0.02