While my mancave budget would go to the Charles Lees photogravure of Musselburgh that Green Jacket Auctions is offering in their latest sale, I know that arguably the single most dreamy man cave item ever to be sold at auction will be the original Augusta National Golf Club entrance sign that hung in front of Magnolia Lane, circa the 1960s.
From the description:
It was discarded by Augusta National many decades ago, but was (thankfully) saved by an Augusta, Georgia resident. That original owner didn't understand its value to the collecting community until he briefly posted it on eBay six years ago. That auction sent collectors into a flurry (and we would know, we immediately heard about it and had every intention of buying it), but the sign was quickly pulled from auction and quietly sold to a collector that made a substantial offer. Though we missed out on this historic sign in 2010, we are overwhelmed with the opportunity of finally offering it for public auction.