We're seeing a bunch of the rare VEI books become blue chip sellers, particularly the high end variants from first appearances. Here's another we can add to that list - Shadowman #13 1:50 Shane Davis variant which features the first appearance of Punk Mambo. Punk Mambo has become a staple character at Valiant appearing in everything from The Valiant to Ninjak and Rapture...also she's got an awesome mohawk and sniffs melted skull glue!
We recently saw a CGC 9.8 copy of this very hard to find variant pop up on ebay and end with a Best Offer of $697 shipped! What's strange about the end price is that just two days prior the seller received two separate offers of $700. Perhaps the seller was holding out for a Buy It Now pop at $750.