Hello Grampie Lyle and welcome to the best dary DIY'r site on the web.
Not really a good question for an open forum such as this.
I have seen floor sanding services range from $1.50/ft2 to $3.50/ft2 and then the finishing on top of that. I would imagine the more the contractor has to do, such as remove and replace baseboards has alot to do with pricing.
I would call a local flooring company or (3) and get some quotes.
When its all said and done there is usually more said than done