I love Proograde products. The quality is great, ease of use is superb, and the sizes are perfect for the Glowforge.
That being said, there are times when I want colors or thicknesses of acrylic that are not offered through Glowforge. I’ve bought tons of stuff from Inventables, but shipping delays are common due to back orders, so here’s a GREAT alternative, and the prices are about 40-50% less - plus, you get volume discounts when you buy more than one item. Larger pieces can save you lots of money, and if you have a Pro unit, like me, you can use the pass-thru slot to cut longer items to size.
Check it out www.estreetplastics.com.
I’m only about 40 miles from their location, so shipping wasn’t bad. I don’t know how prices will be for longer distances.
Here’s a screenshot showing some of their pricing for clear acrylic.