Good info, Tom. I agree with Larry about the solid 304 (at least that's what appears to be the case), but I just don't see one of these. Not worth it as a "keeper" and your experience shows it could be futile to try and flip. Sadly, Weber used up the Ducane name, and it no longer has much recognition or appeal.
The Weber name may mean more than some of its grills actually deliver, but everyone knows it. Better to fix up one of those in my opinion for resale - or even as a keeper if you are starting with an older Genesis.