2
I'm sorry I don't know how to change that, but if it is not possible you might want to try Catads 1.53.
You can show/hide 'Price' in each category and also show/hide the 'For sale' prefix if you want to use the module for something other than classified ads.
Get it from the 'Files' page at:
http://dev.xoops.org/modules/xfmod/project/?cat_ads_153
A thread is for life. Not just for Christmas.