Your username here MUST MATCH your XenForo username (connected to your XF license).

    Once you have registered here, then you need to start a conversation at xenforo.com w/Bob and provide the following:
    1. Your XenForo License Validation Token
    2. The Domain Name associated with the License
    NOTE: Your account will be validated once ALL requirements are verified/met. Thank you for your patience.

Item Prefix within the url?

I would want the FOR SALE in the url

Can't say I've ever seen that before. Is there a reason WHY? It would involve modifying core xenforo, its not something I could add to showcase (nor would I). Its also not something that can be done with a template edit.

Out of sheer curiosity, can you show me a site that is doing this?