queen mechandise question

I wonder if anyone can help me I have a few queen collections to sell. I have 22carat gold plates all still in polystyrene boxes only opened to look at all with certificates. And I have a bikers jacket unworn with the hand painted phoenix and wings on the back number 005 made. Does anyone know where I could sell these items

Someone must know please help

ebay?

I don't use eBay. I have looked on there though to check if they did sell on there but it does not seem to sell for a reasonable price on there.