The Economics of the Mirror Exhibit

The show sold out within days, the tickets were 20 euros and on eBay apparently Wagon was offered for 2724. So there was a huge demand, you did get the impression going around the show that this was absolutely a bucket list exhibition for many people. And they got me wondering what are the arrangements for lending artworks like this. I mean transport and insurance I imagine are expensive but are there other costs as well on top of that?