Reply is directed both to you and @jennywalker2
The fact is that Dish itself usually doesn’t want to be responsible for poking holes in your soffit or roof except as required for the Dish itself.
The other fact is that in many (most?) places, another - usually a local or regional dish / satellite / antenna installer - replaces Dish itself doing the installs. Those companies are usually more than happy to extend their ken to things other than only what is required to get the Dish feed inside your home.
Jenny, I forgot to point out that Amazon has three separate listings for the Antop AT-400B antenna. https://www.amazon.com/gp/product/B01LSPKWUS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 is the right one with “Used” listings including Open Box for $63.63 right now from “Amazon Warehouse Deals”. They won’t let anyone including their own return / refurb group list open box as “New”, this is it. It shows up “Like New” under Used listings. Typically they might have almost identical items listed as “Very Good” with the same description for a couple of bucks less. It seems to vary even among the various Amazon fulfillment locations.
When I bought mine they had about a dozen in stock and were offering 20% at checkout off even that price, which is how I got down to under $50.