Buying at eBay and Amazon through an intermediary system is not the ultimate solution, but a good step in the right direction. Once services like this becomes more popular, platforms like eBay and Amazon will see that there are a need for payment options like this and they will consider offering direct Bitcoin payments on their sites.

I am currently shopping at similar sites like this with Bitcoin via reputable Payment processors and these sites are already considering cutting out the Payment processors and excepting Bitcoin directly.