I got an email today, it went like this:

Hello,

Please send me price for your domain.

We are very interested in this name.

Did you get offers from other people already?

Our company develops client-server systems (Delphi / Interbase), so investing in domain names is not my main business.

Looking forward to do business with you.

Best regards,
Masafumi Herosuki, Ph. D.
President
Opera Solutions Ltd.

What do you make of this guys??

Well Opera Solutions Ltd... sounds quite big?

I'd say reply to them with a high price and see if they reply. If they don't, mark them scam!

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I'd say it's a scam, since he can't write very well but apparently has a PhD. I'd beware for sure.

Definitely a scam.

What they do is appraise the domain then scam you. im not sure how the whole process works, but it happens to alot of people.
Go here for a list of possible situations:
http://www.sean.co.uk/a/webdesign/domainnames.shtm

Im not going to reply. Im sure that will tell them that Im alive and got their email..
Yes their name sounds big but Im quite sure its a scam