Troy 45-degree offset back-up iron sights

These are the Troy 45-degree offset back-up iron sights. 

The RDSC page (where I purchased them) is: https://www.rdsc.ca/troy-industries-45-degree-offset-m4-front-di-optic-rear-folding-battle-sight-set-black.html

They're essentially new, without any scuffing or marring.  I thought I had a use for these when I purchased them, but changed my mind. 

Preference for a local swap but I can mail them anywhere in Canada for about $20. 

Been getting an unusual number of "bargaining" messages about this.  The price is firm.