If you’re going to buy from Amazon, you might as well help SLA financially, no? How, you say? SLA has an affiliate program with Amazon — just use the SLA bookmark to go to Amazon’s site, and for anything you purchase through that link, SLA gets a small commission.
Get the information here on the SLA website. All you have to do is bookmark their link as your normal “Amazon” link, and then your shopping will automatically benefit your professional association!