Rare weapons, reqs and prices
When buying/selling rare skin weapons, and one knows the price range for a given weapon at req 9, how would one determine the value of the same skin weapon that comes with a higher req?
a rare skin sword, "Frog Blade"* at req 9, costs 100 ecto,
how much would the price drop for req 10,
and then 11, 12, 13?
Is there a general price drop that holds for most weapons or is it depended on demand for a particular skin?
*The awesome Frog Blade is not currently in the game and is used here merely as example
(Mods, if this is posted in the wrong forum section, please move it as appropriate)