As long as people keep paying higher individual pack prices, the booster box prices are going to keep going up. At least until the rafflers can’t make money off cracking boxes.
That price is still less than $300 a pack. If I told you a single Skyridge pack sold for over $300, it probably wouldn’t shock you that much.
I’d say Crystal Charizard definitely has an influence; there are several PSA 10s currently listed between $4000 and $6000 on Ebay. The last one sold for roughly $3700 (best offer was accepted). A 1st Edition PSA 10 Shining Charizard, by comparison, sells for between $2000 and $2500.
Despite Neo Destiny having Shining Pokemon I’m leaning more toward Skyridge. Skyridge was the final WOTC set ever and is incredibly scarce. Most of the big Pokemon collectors are interested in the early stuff and WOTC era, meaning Skyridge is an absolute must have at some point. Skyridge is a huge piece of Pokemon history.
I barely even remember seeing Skyridge in-stores as a kid come to think of it. After Aquapolis I began to fall out of Pokemon and into Yu-Gi-Oh! but I do remember Skyridge not sticking around for long at retail stores.