I think you are wrong about accessory prices dropping too much.
It's what around one or three weeks since they increased Add-ons shop drop rates, and lowest prices of Epic accesories did not budge why?
Because it's controlled economy where PA sets minimal and maximal prices, so Orange accessories wont drop below certain price even after the whole market will get flooded with them, still they will be around 4 to 7 K BP, maybe if we would be buying them for silver it would be different matter but BP prices seems to be set in stone.
Orange accessory won't get below 4k BP even if they flood market, some whales maybe use it as opportunity to buy some orange accessories but mass buying out of the market will never be a f2p thing in this economy.