There are plenty of basic flip phones that would fit the bill for you switching to Verizon. The D900 on ATT certain is not what I would call a 'good' handset (even on ATT's scale).
Anyway, check out one of the following currently available free models that won't cost you an additional $9.99/mo for data.
I'm looking for a phone that doesn't include the $9.99 data plan...don't need it, don't want it. This will likely mean that the phone I'm looking for is a discontinued one. So, what's the best discontinued phone that doesn't require a data plan? I use a Samsung D900 (ATT) which is a 3MP camera and really thin slider. I don't know if it can get better than that, but I have to switch to Verizon...any help?