I have a plan. If someone looks interested in one of my pictures, and can't quite make up their mind whether to buy it or not, I will try a spot of bribery. If after much discussion, shall I shan't I, dithering about, well I don't know, perhaps maybe, they are going to need a push in the right direction.
This is when I play my ace card. I tell them I have a special offer on today, for one day only. If we can close the deal now then I can give you first choice of one of these exclusive bespoke hand made shopping bags, completely free of charge, with my compliments. I think this would swing it, they are not going to be able to say no.