The sites you noted are not well respected so I'll leave it at that.
Ask in the Cell Phone forum what they think.
I'm finally eligible for a phone upgrade with my verizon account. I'm trying to find a great deal on a smartphone and I've come across two websites that I think are the same company. Cellstores.com and cheapcellphones.com. They have a section where you can upgrade your phone and the price of a Droid Incredible is a lot less than going through Verizons own site. When I put the phone in the basket though, it seems to me that your not only buying a new phone, but adding more monthly charges and services to your Verizon account. If anyone has any knowledge about these sites or any past transactions, your input would be greatly appreciated. All I want is a new smartphone with the SAME contract I already have.