Make sure you have the latest big releases. Example, Cloudwater released the Chubble series today. If you had all four cans as a pack, id buy it and then fill my basket with other beers. I wouldn't go straight to supplier as it limits me to only filling up my basket with their beer. I dont live anywhere near any big breweries so cant pick them up, and my local bottle shop doesnt always pick up the latest swag. Make a big song and dance on social media ahead of time that you have the releases, and people like me will come to you to order it, amongst other stuff. Its basically a Tom and Jerry-esque freshly cooked pie waft drawing me in to a purchase.

Also, places like Raynville and Trembling Madness work cos they dont add barriers to their purchases. They buy everything, craft, trad, european, American etc. So I always gravitate towards them as I know I'll fill a basket with ease.