I ordered 3 26"ers and 3 18"ers. I'm picking up a 26er on Mon-Tues, and have a coworker with a vintage 26er who will appreciate a new grill.
The 18's were super cheap ($1.79 ea). Those 18" grates will work great for flipping upside down and perpendicular to the 22.5" grates to double your grilling space when cooking appetizers or smoking tiny things. I like to use them at the end of the growing season for smoking peppers on my WSM. I already have 2 18" grates for my jumbo joe that I use in my WSM. This should allow me to run another 3 racks of peppers at a time.....woohoo!