If you decide to buy one of these, I put together a nice thread on things to look for.
Almost every SH I've seen billed as "fully working" wasn't.
Not a big deal, they can be restored to 100% functionality but it takes time and work and money.
P.S. You almost certainly don't want the one in Dallas with the NEW monitor as SH seems to give most of the new monitors heartburn. And you don't want the switcher adapter either.