Steve 0r Nate, it's a scam. You should just start emailing them stupid crap.
If you have a site tracker on your website, you should be able to look at the ip location if they emailed you. I know i can look at my site hits, by looking at the outclicks, find the email outclick and get more detailed info. From there i can find out that they were referred from yellowpages and searched "sign shops" with no zip code and that they were from africa. Happens every time i get a funky email.
If you don't have a site tracker, then sitemeter.com. It's the best one to use with a lot of detailed info and it's free.