HP Pavilion 24" Full-HD Intel i5 Touch AIO Desktop

Can someone tell me why this same computer is $20.00 cheaper on Amazon? https://www.amazon.com/HP-Pavilion-24-b029c-All-One/dp/B01M4QI0QI/ref=sr_1_1?ie=UTF8&qid=1479506157&sr=8-1&keywords=HP+Pavilion+24-B029C+23.8