Craig's list may be the way to go for a large collection. Shipping could
be a potential nightmaredue to the size of package. Breakage is a big
possibility unless you decide to break up the setand ship in smaller
quantities.
I did a quick search and did find several listings, one exactly like
yours, also a set with a different stem,all attributed to New
Martinsville. However, as Linda suggested, you may want to wait
untilsomeone can give you a positive ID from a book on ...