Sam from EasyPost here. We are a 3PL as well. We offer all inclusive rates that include things like receiving, storage, pick/pack, shipping label anywhere US /Int., warehouse insurance, etc.
Would be great to connect with you. Send me an email at email@example.com
I would stay away from easypost/shipbob/shipwire. They are very expensive for shipping and charge random fees. I'm currently using Librex Fulfillment for all of my 3pl services. They have the best prices I have found. They also don't charge pick/pack fees so all they charge you for is shipping.