There a many ways to price a home for sale. In most markets the time of year not only has a bearing on price but how quickly it will move.
When there are no comps to use for an asking basis try this:
Take the 3 most recent high dollar sales in your market. Calculate the price per sq ft for each.
Then add them and divide by 3. Multiply this nr by your sq ft and see if the $$ are acceptable.
Location and the barn may contribute to inflating the price even more. A motivated buyer seeking a well crafted timber frame will pay a premium price but these folks are hard to find.
Advertise in Scantlings and any wood trade publications you can find. Advertise in the TF magazines.
Good luck.
