There was an article in Popular Photography and Imaging (Aug 06) on this
subject.  Here are some of the sites: istockphoto.com     shutterstock.com
dreamstime.com   bigstockphoto.com   fotolia.com     alamy.com      Good
luck based on the article its not easy to sell these photos cause its so
many photographer submitting photos.  HTH

Can anyone recommend a website for selling photos?

Since you weren't so clear on how exactly you want to sell photos (stock,
events?), may I suggest smugmug (www.smugmug.com)
They have a "pro" type of account that allows you to set the price of your
photos make it available to people to buy it.

disclaimer: I'm not affiliated with smugmug, I'm just a standard user. I can
provide you with a $5 discount though if you like.