WordPress has a host of plug-ins (some with very interesting names like JigoShop or WooCommerce!) that are compatible with many of our gateways such as Authorize.net, and NMI.
Because there are so many variables we suggest you use our contact us form to tell us a little about your business, we can then get back to you with some low cost gateway suggestions.
Have a question? Need general information, rates, or help with getting started? We are happy to help even if you just have a quick question about the industry - even if you are "not ready yet" - even if you just want a little free advice. We regularly earn clients' business years after we first speak. Please visit our contact us page or call us at 207-772-8737 any time.
All the best - Matt