The Buy-a-Box promo is only available in traditional foil and only through the Buy-a-Box program
While I completely understand why it can be a confusing mechanic, now that I understand how it works, I think its also a very useful one
The challenge is protecting items worth $10 to $10,000+ while keeping shipping costs low enough to maintain your margins
Umbreon V (Alt Art / Evolving Skies) $389.17 Umbreons massive popularity makes Umbreon cards desirable and valuable beyond the VMAX version and this card, also from the Evolving Skies set, is proof of that
Buy Dunwich and use those characters or just play better and use a core set
Retailer and prerelease promo cards tied to new launches tend to spike for short, profitable windows, and reverse-holo complete your set singles do steady work for collectors filling binders