Hello! We are getting ready to send out our save the dates, which are postcards. I'm told postcards can use a smaller and cheaper size stamp. The postcard size stamps through USPS are not very pretty, but I found some nicer ones on Zazzle. Has anyone ever bought their postage from Zazzle? Was it legit/easy/good quailty? Do you recommend? Or does anyone have any other ideas? Thank you! ETA: clarity