Hunting for Dewa Jashin merch has become one of my favorite online rabbit holes — I get way too excited seeing Hidan-related figures and shirts pop up. I usually start with mainstream shops: 'Crunchyroll Store', 'AmiAami', 'HobbyLink Japan' and 'Mandarake' are my go-tos for both new releases and secondhand finds. For official figures look for makers like Banpresto, Good Smile or Tamashii Nations in the listing title; prize figures often show up cheaper at Mandarake or on Yahoo! Japan auctions, which I access through proxies like Buyee or ZenMarket.
If I'm after fan art or custom items I check Etsy, Redbubble, and TeePublic for prints, pins, and shirts. eBay is great for rare pieces but I always double-check seller ratings and clear photos of packaging. For Japan-only listings I use proxy services or shopping-forwarders, and I keep PayPal on hand for buyer protection. Oh, and remember import fees — consolidators can save money on shipping. I love the thrill of finding an obscure Hidan keychain and saving it from obscurity; it feels like a tiny victory every time.