Samsung Galaxy S24 Ultra 512GB unlocked typically costs $28.14 less than Samsung Galaxy S25+ 256GB unlocked on eBay right now ($559 vs $587 median asking price, item + shipping). Per GB storage, Samsung Galaxy S24 Ultra 512GB unlocked is cheaper: $1.09 vs $2.29. Prices from filtered US eBay listings, checked twice a day; asking prices, not sold prices. How we price.