I do not take credit cards at the shows I do because they are fairly small. I will take checks and good old green paper. With the checks get all the info you can especially tele.# Usually people have custom checks. As far as credit cards go you need to establish with a company and they rent the machine or you can buy it I guess. At the end of the show you have to call in all your receipts and there is a charge. That is about all I know Some one who does it will be able to answer better on the cards thing. I know people rely on cards for everything today but if they are going to a show they should realize not everyone has the ability to accept cards. Now do you loose sales because of it that is debatable. I have never lost a sales because of it. I will deliver and they can send a check. When check clears the item is shipped. That is the understanding. A little like EBAY.