They'll work fine in can cannons as well as any other typical use of a blank. The rounds are on stripper clips and are plastic sealed, and come with a speed loader.
Price - $75 shipped
Shipping - UPS Ground to CONUS (where legal) only, buyer must be a US citizen.
Payment - PayPal F&F or G&S (+ 3%) - Zelle - Venmo - USPS money order
All forms of payment must be discreet. E-payment is expected within 24 hours of sale. Given multiple "offers", I will operate on first come/first serve basis.