In the market for a small form factor PC, but not sure what to buy? Check out Shuttle’s special 3-day sale on Newegg. The box we’re talking about is the Shuttle SX8J3, a LGA 1366 motherboard jammed into a tiny case, all for “sub-$450″. Be aware that the price drop won’t show up until tomorrow (8/26) and only lasts three days. Shuttle products rarely go on sale, and this particular system typically retails for $529.99, so this is a pretty deep discount.