Ah, a colourful rarity. How delightful! Especially considering just how beautiful this box of the 1983-released SG-1000 still looks. A SG-1000 in such a box does cost a bit more than your average SG-1000 (which isn't that cheap to boot), but it is indeed the rarest version of the boxed console available. The console itself, also known as the Sega Game 1000, is the Master System's granddaddy , and uses a Z80 CPU at 3.57 Mhz, a TMS9929A video chip and a a SN76489A sound chip.
Find out more about it and -rather obviously- grab the thing via this Sega SG-1000 auction. You'll be bidding on a colourfully boxed, first edition SG-1000 complete with manual, RF switch box (but no cable), manual and poster. You'll also be bidding on the Sega Card Catcher peripheral and 26 games on cartridges and cards. Seller ships worldwide.