Can someone please help me figure this out as I am still a newbie on this and can't make heads or tails out of this. I am in the process of getting an Overland Bar from Carlin (circa 1958). The Official Casino Price Guide rates it at an R-5 with only 76 known to exist, and says it is worth $400. Then, the Chip Rack values it at $100- $175. Which is correct? Naturally, I like the Official Casino Price Guide best!!!