Source for CO2 fire extinguishers?

So I pulled the trigger and bought this fire extinguisher today on Amazon based on everyone’s opinions on this topic. It has the 9sec discharge which I think would be appropriate for the laser (maybe I’ll buy a CO2 one as well as a back-up)! At $84.33 with free shipping (Prime member), I thought it was a good deal (the link shows $99.50 for some reason…non-Prime pricing?). I put this into CamelCamelCamel and it showed it was only $5 above it’s lowest price and a bunch lower than its highest. If you’ve never used that website, it’s great. It’s where I keep my Amazon wishlist and it sends notices when an item has fallen below the set price you’re willing to pay!