I'm sorry I delayed responding to this post, because it was a year out of date. But this forum is still so manageable, I realized the info I can offer might still help out others. :^)
Number one main point--yes, taking credit cards can greatly--GREATLY--increase your sales. Sometimes 90% of my sales are credit cards! I hear all the time from craftspeople that they don't find it necessary to take cards and I am baffled. I don't know many people who could have written a check for that Ū,000 sale I made at my last show! :^)
Getting set up with point-of-purchase credit card processing can be expensive (cell phones, terminals, printers, phone lines at shows etc.) Even then, you still may not have great reception. It can still cost in the hundreds, if not thousands, of dollars for such systems.
An easier and much, much less expensive way to get started taking credit cards is buy a manual imprinter (known affectionately as a "knuckle-buster") for around ำ and set yourself up with a merchant service account. It's no mystery--check around with local banks first for the simplest start-up. Usually such local banks will not be too fussy about how big-time your craft business is. Application fees run anywhere from ๛-贶 one-time fee. You may pay a monthly service charge (my first account was ů.50/month) and a rather high percentage on your sales (my first account I paid around 4.5% on each sale.) Part of the reason for such a high fee is you are dealing with a local bank and you are not swiping the credit cards through a terminal or getting an authorization at the show, with the customer's card in hand. You will run their card through your manual imprinter, capturing their cc number on a paper slip, and enter the sales transaction by telephone once you get back to a hotel room or home in the evening.
After a year, I moved to Discover/Novus business services. I now pay no monthly fee except a terminal rental (ű/month) and my percentage is around 3 something%. I do not pay per transaction or pay any other fees. At different times, Novus offers different incentive programs--for example, lately they have not offered this terminal rental program--so it's good to check in periodically to see what they have to offer. You can talk to my agent, Robert Schoen at 1-800-239-7696 and ask him any questions you might have. He is deeply supportive of artists and craftspeople (he has a son who is an artist) and he is extremely patient and nice. Also honest! Novus rates right up there in customer satisfaction, and the rates are comparable to Guy MacDonald's company. I also hear good things about Guy's company, but they don't currently offer the program I was able to get with Novus so it isn't worth switching for me.
Hope this encourages even people just starting out to seriously consider expanding their income potential!
Luann