Used books

There are a few classic books that I have heard highly recommended but haven’t been able to find since they are out of print and seem to only rarely pop up on the used book sites. If you have any of these that you would be willing to part with for the right price please send me a PM with the price range you’re looking for. Thanks!

Woolsey:
New Ideas in Backgammon
Backgammon Encyclopedia Vols. 1/2

Robertie:
Advanced Backgammon Vols. 1/2
Modern Backgammon