I'm developing my first e-commerce site and I'm not really sure which way to turn for setting up an order management system. To give you some background it's just a small ecommerce gifting site that will offer roughly five different products. The easiest thing would be if paypal emails me all the order details including customer notes as soon as a payment has been completed. I'm looking for an inexpensive solution that's not going to cost me a hundred dollars a month, or charge me per sale. Can anyone recommend a reasonable order management system that can be integrated with paypal?