E107s are easily one of the toughest caramel sets. It has been commented elsewhere that nobody has ever put together a complete set of them... though a couple are close. To me, that speaks volumes. I did not see that Hickman or I would've picked it up personally. I regularly search for E107s, but missed that one.
There is an E107 Hall of Famer listed in the upcoming Heritage Auction.
http://sports.ha.com/common/view_ite...8&Lot_No=80033
(Full disclosure... I consigned it to them.)