When a game is not available on the user's store it's displayed as "Free" by the extension. Example:
https://steamdb.info/app/200010/
is not available in my country and I get this:
https://gyazo.com/dec530e53128680a2f27b08f78e3a0ea
Thanks anyway for your good work!

Since trading is mostly done with people on another country, and regional pricing varies so much, I think it would be useful for each user to define which store is going to be used as a reference for pricing display and calculations.

So if I'm trading ROW keys/gifts I'd likely use EU or US stores, since they are consistent in most cases.

But occasionally picking the particular store of your fellow trader instead may allow for a better insight on how your offer will look to him.

(Obvious note just in case: this is not the same as applying a currency conversion obtained from the web, you actually have to get the pricing for a particular store.)

I'm not sure on how to implement such a thing, but from the script's standpoint this might be as simple as appending ?cc=eu -for instance- to the game URL, but it only seems to work if you're not logged in to Steam.

YMMV, though. Thanks for considering.

I get some Infinity and NaN results. Maybe it's related to games not being Steam games? See here.