Good day to you. I do agree with George. Unless you are well versed in Floor re-finishing especially with old historical floors, I would definitely call in a consultant and strongly consider having it professionally done. You want above all else to protect the original integrity of what you have. You can only re-finish those boards so many times. The question is have they been refinished before and if so, how many times. Pine is extremely soft. Sanding will really take away thickness if not done correctly.
As for the finish sheen, gloss will give a bright shiny "eye drawing" appearance but will also enhance any scars, stains, defects, etc. Mid-sheens or low gloss will not be as "popping" to the eyes but will buffer or hide a lot of the scars, etc. It also depends upon where you want the homebuyers' (or others for that matter) eyes to be drawn to. If you want them to see the architectural details or the furnishings then stick with lower gloss. It is always in the details.
Also consider before you take upon yourself this great task, stripping and re-buffing/ waxing the floors. This process can go a long ways in making old floors look beautiful again and the cost is WAY less. The impact is also less to the integrity of the floors.
Good luck to you. You have a beautifual home.
Stephen B. McClain, Broker Owner
Cornerstone New Home Solutions