What's the average cost of a dental partial, one that would replace missing teeth on the top and bottom on both sides?

You're talking about two partials?

Would this involve any root canals or fixing of anchor teeth? Do you want permanent bridges or removable ones?

This is going to be "Stage 2 " of the dental work I will be having done... The teeth will have already been "prepped" for the partial if that's the route I decide to go, rather than implants.

Ooo... and yes I guess it would be 2 partials...

Tbizz... it all depends where you live. Each State/Province has their own Dental Fee Guide. If a denturist is making your partials the cost could be significantly lower than a dentist. If you are having the dentures made at a College where they teach dentistry it could be even less yet.