They literally had all the pieces already in place with their catalog/mail order/warehouses.
They already screwed up however
In 1993, Sears discontinued its famous catalog to focus on in-store retail operations.
To fight off Walmart they got rid of all the shipping and things that made the catalog work in 1993 like the little outlet /pickup stores in small communities.
They focused on the physical stores and peaked in 2007 just in time for Amazon to take off. They no longer had all that distribution that gave up in 1993.