Hi Charles,
In the 3 1/2 years we’ve lived in Ecuador, we have had people mail us letters from the US. Usually they take from 3-6 weeks to reach us, although we are currently waiting for some mail that was sent over 6 weeks ago. As for packages, UPS, FedEx, DHL, and others do make deliveries, but there are two issues: 1)they are expensive 2)packages must be checked for contents, and may have import fees added.
For these reasons, Amazon and some other online resources just do not offer shipping to Ecuador. It is possible to get things shipped here, and there are some private groups that bring things in for expats, but in general it is an expensive option. If we really need to order something from the states, we usually ship it to family there, and then either “mule” it in with us on our next visit, or get traveling friends to bring it to us.
Shipping within Ecuador however is relatively cheap and easy. Servientrega is the equivalent of UPS locally, and is very efficient.