AOmarket provides an easy way to sell and auction items. Now I'm trying to add easy ways for buyers to find those items.
I'm not fluent in PHP so I'm hoping for some help in creating this module. More info on the available XML feeds can be found at http://www.aomarket.com/bots.

Description:
A module to search AOmarket.com for items for sale and to advertise your AOmarket shop.
AOmarket already provides XML outputs for this.

Commands:

!wtb <search parameters> (Can be used in tells, privategroup and guildchat)
Returns items matching the search terms.

!advertise <shop number> <interval in minutes>
Toggles advertising for your AOmarket shop on some predefined shopping channel. Posts a blob with a link to your AOmarket shop. The blob could also list the items in your shop.

Ah that's ok, the !wtb command is most important anyway.

But as far as advertising goes, I see plenty of bots on the shopping channels that do that?

If someone is interested in porting it to bebot feel free.  There is an AOmarket search module for budabot.  It only supports searching the AOmarket website, no spamming of shopping channels