T206 Plank undervalued?

Hi, everyone
We all know the T206 Wagner is the king of baseball cards. However, the T206 Plank is starting to make some noise. A couple of months ago in April, an SGC 10 sold for $16k, a PSA 1 for $21k, and an SGC 30 for $35k. All three of these prices are record highs! Since the Wagner card gets all the attention, are we finally seeing the Plank card narrowing the HUGE gap?
We all know the T206 Wagner is the king of baseball cards. However, the T206 Plank is starting to make some noise. A couple of months ago in April, an SGC 10 sold for $16k, a PSA 1 for $21k, and an SGC 30 for $35k. All three of these prices are record highs! Since the Wagner card gets all the attention, are we finally seeing the Plank card narrowing the HUGE gap?
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Comments
1) The variation is on the BACK of the card. (not too many people collect cards due to its back)
2) There are already FOUR poses of Cobb in the set. (only 1 for Plank and 1 Wagner)
3) It doesn't have a "neat" story behind its scarcity (anti-smoking, broken plate, etc)
By the way, does anyone have a (low-grade) T206 Plank for sale?
D's: 50P,49S,45D+S,43D,41S,40D,39D+S,38D+S,37D+S,36S,35D+S,all 16-34's
Q's: 52S,47S,46S,40S,39S,38S,37D+S,36D+S,35D,34D,32D+S
74T: 241,435,610,654 97 Finest silver: 115,135,139,145,310
73T:31,55,61,62,63,64,65,66,67,68,80,152,165,189,213,235,237,257,341,344,377,379,390,422,433,453,480,497,545,554,563,580,606,613,630
95 Ultra GM Sets: Golden Prospects,HR Kings,On-Base Leaders,Power Plus,RBI Kings,Rising Stars
http://sportsfansnews.com/author/andy-fischer/
Sotheby's today just sold a PSA 6 (mc) T206 Plank for a cool $95k (including buyer's premium). Another record high for Eddie! For those of us who can't afford or don't have the $ for a Wagner, maybe owning #2 of "The Big 3" is a consolation :-)
Does anyone know who owns the only PSA 8?
Though personally I'd rather have a NRMT 1952 Topps set for that $90K.
D's: 50P,49S,45D+S,43D,41S,40D,39D+S,38D+S,37D+S,36S,35D+S,all 16-34's
Q's: 52S,47S,46S,40S,39S,38S,37D+S,36D+S,35D,34D,32D+S
74T: 241,435,610,654 97 Finest silver: 115,135,139,145,310
73T:31,55,61,62,63,64,65,66,67,68,80,152,165,189,213,235,237,257,341,344,377,379,390,422,433,453,480,497,545,554,563,580,606,613,630
95 Ultra GM Sets: Golden Prospects,HR Kings,On-Base Leaders,Power Plus,RBI Kings,Rising Stars