WW and Sensations are tremendously undervalued, but I wouldn't put an ounce of faith in cpg.com, and even to some extent, overstreet.... I mean, where are they getting sales data from to support the jump?....there are so few 6.0 and above issues, and I haven't see very many at all change hands in any venue (ebay, clink, heritage, etc etc)....so are they just "making" these price jumps up?
but,as more and more collectors realize WW and Sens, and as demand increases (supply is certainly not going to increase), then yes, price jumps are to be expected....but, I can tell you right now, that if a cgc or raw 6.0 WW #6 came to market, it would be worth way more than $1000 (double overstreet and 40% more than cpg)....and, why is a cgc comic "worth" more than a raw?...that is the craziest thing I have seen...a 6.0 is a 6.0, as long as it is really a 6.0!
rick