As the title suggests, it's pretty painful trying to find databases in amongst all the "article"'s for sale in the content section, a new subforum for databases would be gladly recieved.
only if everybody explicitly states that it's a "database" or "db", still it would be a lot easier for all parties to have a subforum for it. counter, why not merge "sites" and "domains" and suggest people search for "domain" or "site".
There are a lot more domains/sites being sold than content databases. Not sure there is really enough to warrant it's own sub-section.
A good rule of thumb I use for splitting apart B/S/T areas into a sub-section would be if there are 75-100 threads/week being created for whatever the new sub-section is going to be. I haven't gone through the content area too closely, but I doubt it's up to that sort of volume yet for content databases. No one wants an empty sub-section.