A previously lost painting by renowned Spanish surrealist artist Salvador Dalí, which was purchased for just £150 at a London garage sale, is now expected to sell for 200 times that amount at auction. The remarkable discovery highlights the ongoing potential for valuable artworks to surface in unexpected places. The painting's authentication and subsequent valuation represent a significant windfall for the original purchaser, who likely had no idea of the artwork's true provenance and value when making the initial purchase. This case exemplifies the art world's capacity for surprise discoveries and the substantial financial rewards that can follow proper authentication of works by major artists. The upcoming auction is expected to generate considerable interest from collectors and institutions worldwide, given Dalí's enduring popularity and the dramatic circumstances of the painting's rediscovery.