Humans are suckers for a set of glossy feathers. The next step is to turn on the charm.
People love a bright-eyed curious look.
I find it easy to accomplish this by simply puffing up my head feathers and cocking my head to one side. Now, pause a moment to let them admire you as you check them out. And, oh yes, now cock your head to the other side for good measure. Hopefully, by this time your current owner will be making with the giant sales pitch. I'd also encourage some head bobbing.