Amazon increases free shipping minimum order to $49
Amazon.com has raised the free shipping minimum to $49 from $35 for non-Prime members, according to information provided on the Amazon website. The company hasn't published a press release with the news. For books, the threshold is still $25.
There is unlimited free two-day shipping for Prime members. "A higher minimum order requirement for free non-Prime shipping effectively increases the appeal of Prime membership, and Prime households spend disproportionately more than non-Prime households." A steep 32.8% increase in fulfillment costs had a negative impact on quarterly earnings announced on January 29. Prime membership increased 51% in 2015.
http://www.marketwatch.com/story/amazon-ups-free-shipping-minimum-to-49-from-35-for-non-prime-members-2016-02-22
There is unlimited free two-day shipping for Prime members. "A higher minimum order requirement for free non-Prime shipping effectively increases the appeal of Prime membership, and Prime households spend disproportionately more than non-Prime households." A steep 32.8% increase in fulfillment costs had a negative impact on quarterly earnings announced on January 29. Prime membership increased 51% in 2015.
http://www.marketwatch.com/story/amazon-ups-free-shipping-minimum-to-49-from-35-for-non-prime-members-2016-02-22
If you order from them more than four to six times in a year I would say it's absolutely worth getting.