This article is from the Bicycles FAQ, by Mike Iglesias with numerous contributions by others.
From: "E. Paul Stanley" <email@example.com>
Date: Sun, 09 Mar 1997 19:14:59 -0500
All subject lines in rec.bicycles.marketplace should stick to the
Where <CODE> = FS (for sale), WTB (wanted to buy), WTT (wanted to
<Size> would, of course, be omitted for some items.
Commercial vendors could use the following:
Where <spam> would be the crap enticement to go to the web site, email,
There is no space between the Code, the colon, and the size of the item
to conserve space and make sure the complete subject comes out.
Following this nomenclature would permit newsreaders to see similar
items grouped together and would highlight spam which would not follow
The argument that "I have a buch of stuff to sell/buy so it would
require bunches of posts" is without merit. First, "Regular" people
don't have bunches of stuff so it would be a "COM:" post. Second, if a
regular person does have a buch of stuff, simply post the same message
with the proper subject lines for each item. Several posts, but only
one copy and paste from your word processor.