An absolute bargain, especially if it's 'crown grade'...imo.

Will it need to be refinished? If so, installing and finishing will cost more than $3 a foot. That said, it would be more valuable than some crappy laminate and it would likely be able to be refinished repeatedly in the future. It will probably outlast you.

How deep are the notches? That price smacks of problems getting usable pieces due to the amount necessary to remove. Needs to be no less than 5/8" thick(to allow for future sanding) and no less than 1/2" thick. And why does the notches have to be removed?

Any shop with a planer can do the planning---probably charge by the linear foot. No way to determine that amount due to differences in location/work load/etc.

As with the majority of reclaimed products the time and labor put into transforming them is usually more costly than the price of the raw material. In this case I think that is what you will come across. We have people bring us material all the time, sometimes it is something we can work with depending on the moisture content and prior finishing. We typically charge based on how long it takes our shop to prep, set-up, and run the material. Good luck in your search and let us know if you have any other questions.

$3 sq ft is still a good price for salvage. The notching was done because it was random thickness, hand-planed on the top and the t&g's hand planed from the face side; the notching was to gauge it to a reliable thickness only where it crossed the joists. History-wise, this is very early flooring. Unless it is full of insect damage, it's well worth it.

You will have to rough-plane the back side so it can be laid on subfloor.

Flooring this early is always from oldest growth wood. I have seen lumber like this with over75 growth rings per inch.

Once it's ready to lay as flooring,it's worth $16/sq ft.

Casey