Trusted community sources like Pinderellashop.com or Collectrandom.com offer authentic bulk packs for roughly $3 per pin .
Buying bulk lots is the most popular way to get "traders" before a Disney trip. buy pins in bulk
Be cautious with extremely cheap lots on eBay or Amazon. Many are "scrappers" (factory seconds or counterfeits). While Disney Cast Members will usually trade them, serious collectors may not. Trusted community sources like Pinderellashop