The dependence of prices on the size of the picture.

[Barbi]

As a true picture of the cost impact of the size and material of manufacture?
All filled up with drawings, cardboard boxes , boards and microscopic size, that the wall does not look well. I understand that this stuff from 25x30 all the pot-bellied , and disposed of not investing in it. And the canvas of normal size screws for money. This is clearly a trifle on the wall does not hang , do not buy it as to be stored on a bookshelf.
Help to understand how the price depends on size and material!
For example, if a black and white drawings on sheet landscape of the author go to auctions for $ 1,000 , postcards with reproductions of his paintings at the time of the USSR 10-15 bucks, as the fair price of oil on canvas 55h55 ? Is it permissible 80,000 bucks? <! - ~ 12 ~ ->