We have about 60 eBay searches saved which we execute twice per week, and another 40 that we execute once per week. ‘Search title and description’ is ticked on all searches, and most of them are performed at the ‘Book’ category level. The gist of the more frequent searches is something like the following:
I don’t use key words "first printing" or "first edition", since there is a lot of misuse of such on eBay.
Another example of a routine search is
"lois lenski" (dj,dustjacket,dust,jacket,dustwrapper,wrapper)
If you would like to use some saved searches of prominent children’s book illustrators, then go to http://1stedition.net/caldecottmedal.html. Each of the Caldecott winning illustrator is a hot link to a saved eBay search.
I’ve executed these searches routinely for the past decade.