Hey Red,
I think low req Paragon Shields in General have no real purpose except collecting. So although 5/13 tac shields have purpose for pvp - mot shields wont.
In general Gold q8/16 Mot Shields go for 2-3a. So i think a q5/13 will have a bit less value then the q8/16. (and if you ask me, the skin sucks xD)
if you come across a gold q8/16 of the same skin i would be willing to pay at least 3a, but I cant see this shield go for that much
I hope that helps