Netgear Router R6400 AC1750 - $60 (Whitesboro)

This router is brand new.
There's nothing wrong with it.
It doesn't have a coax port on the back like my old one does.
In order to use this, it would have to be put in the basement with the cable company's modem with an ethernet cable, or I would have to buy an additional modem which I don’t want to do.
I need to buy a combo modem/router.
I spent a long time researching modems and routers looking for the best one I could find.
In my research, I was told that since I had the cable company modem, I would only need a router.
And the best router I found was this one.
It's a great product, but I just can't use it.
The company I bought it from won't take it back because it's been over 30 days I'm only now just hooking it up because I have been working on getting my new laptop to work and didn't want to throw another new piece of equipment into the mix.
Cash only.