Thats because they are so expensive, rare to find even as second hand. I think i have The Last Revolution in my Lord Dunsany shelf, remember it costed alot of money as second hand. I adore Lord Dunsany, he is my alltime fav nr.1 author but there is alot of more important works of his to read,buy. He was so prolific for great stylist, creative author.
Baylor i would recommend you look into his War Tales, his Ginger Cat play, his other plays. He wrote so much that was brilliant that wasnt SFF.