Can anyone help me as to where I can get the best deal on a Canon EOS 450D (with lens) either in Bangkok or local to me in Hua Hin, Thank you

That is an old model, superceded by the EOS 500D last year,

And the 550, with Full HD video capabilities for less than 30.000 ฿

Not too sure they still sell it indeed.

I have one that I replaced with the Canon 7D.

But I still use it from time to time, and my wife, good camera actually.