Wine Buyer is a wine deal analysis service that helps shoppers assess whether offers from selected online retailers represent good value. Its coverage includes Last Bottle, Last Bubbles, First Bottle, Wine Spies, and WTSO. For listed wines, the service brings together offer prices and available comparisons, including Wine-Searcher average prices, retailer-stated prices, and estimated current online pricing. It then provides benchmark-specific verdicts such as Great Deal, Good Deal, Fair Price, or Not a Deal when sufficient price data is available.

Wine Buyer also helps identify mystery wines and surfaces secret or hidden wines available through participating retailers. Listings can include wine details, critic ratings, CellarTracker links, and vintage-chart information, giving users additional context alongside the deal assessment. The site features live offer analysis, a historical archive of past offers, and community comments about wines and deals. Users can browse examples and retailer catalogs, while free accounts and supporter access provide ways to explore additional secret-wine listings.