The stupidity lies not so much in the fact that it's a Destro or Storm Shadow or Cobra Commander or Snake Eyes or Duke, it's in not knowing which ones will be hot items and which ones will tank.
How is that so hard to tell? There are literally a half dozen or more GI Joe fan sites, and with a line geared towards collectors, there's no better way to gauge the pulse of a fan line than by simply browsing the posts there. You couldn't ask for better feedback on your core market. (Not talking kids or film-based toy lines, but collector lines like 25th, 30th, or POC.)
When it's a collector line, spend money wisely by making a "ultimate" Storm Shadow just like the Snake Eyes from POC, and produce enough of them. Or an updated V2 Storm Shadow, one that they sort of missed badly in the 25th line. Or a cool, reinvented take like Resolute Snake Eyes. Or with Destro, redo the original 25th one (which was missing a knee joint, had weird hands that held fuck-all, and a body design that wasn't that accurate to the original toy or cartoon) or do a badass updated one with cool accessories, something similar to the Moneybags Destro. Don't give some shitty, environment-specific design that's ass ugly and comes with some weird gimmick with oddly designed parts. I knew the second I saw "Arabian Storm Shadow" and "Arctic Destro" that they'd pegwarm hard, and sure enough, they did.