50D problem - no power

[alextdel]

I took my 50d to Cameras Direct on the Gold Coast (highly recommend for knowledgeable service). They checked out that it wasn't a battery issue then gave me the contact number of a Canon repairer (ex Canon tech). He told me on the phone that the camera isn't worth repairing (dc-dc fault or main board fault.) The camera has been used lightly, cared for and I purchased it new in 2009.
Is this a reasonable amount of time for a dslr of this brand/type to last? I'm wondering whether it's worth spending more, less or the same given my experience. Any ideas, comments or opinions welcome.