I definitely think some sort of grade range should be required. You are buying a comic book that can vary wildly in price depending on the condition of the book.
Here's another thing I see sometimes... WTB post that do specify everything that is needed. They list the book(s), issue number(s), acceptable grade ranges and even "although IMO you shouldn't need to do this"...a price willing to pay!
and THEN....you hear nothing from them when there will be several posts ...like "I've got a copy within your buying parameters or "Here it is.."....
I thought the WTB was supposed to be for SERIOUS buyers not for "Tire Kicking" to get virtually something for nothing.
Whenever I post a WTB thread, I make sure I have the money to pay for it should some seller have what I'm looking at the price I'm willing to pay. I want that book and I'm posting a WTB thread because I'm serious about buying it.
That reminds me.. Looking for a CGC 9.8 copy of Action Comics #1 and #2.......etc...