sabretd wrote:... Do I have to use a MoCA capable router, or is this for some added benefit? I will just be using the router for wireless devices ...
Yes, if you want to connect directly to coax without the adapter. IOW, the adapter on a MoCA-capable router is essentially built-in. Also, the only commercially available such devices are by Actiontec.
sabretd wrote:... if I were to buy a used router, it it any more difficult to configure it as a bridge in terms of needing passwords/logins/etc.? Is there any risk in buying used, or value to buying new?
It's rather straightforward. You will find everything you need to know somewhere in here: