[Seriy]

literally. Increase the number of owners of paintings, for example. When the portrait presents portraits, he not only PR, but also increases the base of the owners of his paintings. The same thing - selling cheap paintings, t e a small, simple or replicable. There will be more pictures in the possession, there will be secondary sales.
 Also, I recently read in the pricing policy for artists - not
be afraid to expand the price range in both directions - let it be, and cheap, and expensive work. This does not discredit the artist, and creates confidence in the fair and reasonable pricing, and as a result, increases sales.
When the work is cheap, then keep their quotation inexpensive.

Picasso was such expansion, he wrote hundreds of so-called "portraits of Dora Mar" - small, simple, repetitive, but a lot. He began to do not with Dora and Marie-Therese, but it does not matter ...