As one of its daily deals, Best Buy offers the Bose QuietComfort 15 Noise-Cancelling Headphones, model no. QC-15, for $249.99 with free shipping. That's the lowest total price we could find by $19. They feature a triport acoustic headphone structure, detachable audio cable, in-line remote and microphone, and fold-flat ear cups for storage. Deal ends today.