via eventbrite.com
Our school puts on an annual benefit, and would love to sell tickets online, and have families be able to process credit cards via the site. There a few companies that offer such services, but often as seemingly steep per-ticket prices. Eventbrite (which I've used before) is a little pricier than we want, but feature rich.
I've been investigating Events.org and Brown Paper Tickets, too. Brown Paper Tickets looks quite good, but might not be the style we need. Their prices are very good.
Anyone have any great ideas?