show bikes that are not available (online booking)

One of the most powerful features about the BRM / RSM online booking wizard is that it works against your LIVE inventory.
Meaning that you can only rent what is available.
May 2017

BRM will let you customise the message when you have sold out of a particular product line, for a given date:

e.g. add your phone number, or even a link to a manual question form you have have.