I have an ask question prompt showing different price definitions like {PRICE:TradePrice}.
I also want to show the default (normal) price but I have tried using {PRICE:Price} {PRICE: } but its not working.
Are you in latest beta?
The {PRICE: } was added to the last/ current beta version.
I have access to beta category but I can’t see any thread for latest beta version only bug reports and issues
EDIT: Sorry I found it a bit down the page. It is not very active at the moment. Will give this a try.
Take a look here 
https://forum.sambapos.com/t/sambapos-5-2-1-beta/14612/7