I found this on eBay. When it comes to Maugham's later books a 1st,1st has less value because of the large print runs. The more copies are out there, the less the value. This particular book-seller is constantly selling 1st, 1st Maugham books without knowing it. I've obtained really cheap ones from them. They don't advertise these books as firsts. You won't find any of the extremely rare ones there at World of Books (known also by World of Rare Books). They are based in the U.K, but apparently have a warehouse in Florida, U.S.A. as well. They are super-quick with their shipments.
http://www.ebay.com/itm/The-Vagrant-Mood-Six-Essays-Maugham-W-Somerset-1952-ID-61384-/381408733703?hash=item58cdbb6a07