I'm looking for this italian quattro fogli for the Blob (Fluido Mortale). The only one I found was on ebay 2 years ago, linenbacked, the seller was asking 5000 euros for it. Looking to past auctions the price for it, not linenbacked and in good condition varies from $1550, to $653 the last one sold in 2016 on HA.What price should I expect to pay for it, nowdays?