Removing SALE Items from BEST SELLERS List

[noyadesigns]

Hello!

How would I remove items that were on sale from the best sellers list please? I'd only want products that are currently at their ORIGINAL PRICE to be included in the best sellers list and products that are ON SALE though they MAY BE A BEST SELLER to not appear in the best sellers list.

I'm currently using:
VirtuMart 2.0.26d
Joomla! 2.5.20 Stable [ Ember ] 30-April-2014 14:00 GMT
Joomla Platform 11.4.0 Stable [ Brian Kernighan ] 03-Jan-2012 00:00 GMT

** Please be advised that at this time, I will NOT be able to upgrade to the latest versions of Virtumart & Joomla! But will do so in the next 2 - 3 months.

Thank you for all your help in advance!