Current high offer is 5.2 BTC for everything.
I personally (emotionally) lean towards selling the entire lot, but holding back one of the golds. But just communicating the current high offer for now.
I would call 5.2
BTC a very reasonable offer on this lot. Way out of my price range

. Looking at what most of these have been selling for the past 3-4 months, I'd say selling all of them separately could possibly get you an additional 0.7 - 1
BTC, but that would also take some time.