Samsung Galaxy S25 256GB unlocked typically costs $27.05 less than Samsung Galaxy S24 Ultra 256GB unlocked on eBay right now ($492 vs $519 median asking price, item + shipping). Per GB storage, Samsung Galaxy S25 256GB unlocked is cheaper: $1.92 vs $2.03. Prices from filtered US eBay listings, checked twice a day; asking prices, not sold prices. How we price.