A friend of mine has me helping him track down an SG, and so I've notice that the used Gibson USA '61 Reissue runs $300-$400 more than a used SG Standard. What's up with that? Can't see how a slightly different neck carve, different pickups and smaller pickguard add up to 35% more on the price tag...any logical reasoning behind this? There certainly doesn't seem to be fewer '61 reissues available...what am I missing here ???