I replaced my 11 year old Weber this summer, mostly because I wanted a slightly larger one. Otherwise I could have had it back to brand new for probably $150 in parts and a Saturday afternoon.
A guy in the neighborhood took my old one because he was getting ready to rebuild the guts of his 20 year old Weber and figured the project would be a little easier on mine.
Grills are super-easy to refurb. If you can source the parts. Major brands like Weber are incredibly easy to find parts for.