I discuss smart investing in another Art Advice column. In addition to the other information about a work of art, exhibition credentials are important when assessing the value of a work, too. A strong exhibition record or a history of the work's inclusion in exhibitions is of value. Exhibition frequency, awards, and exhibition design placement remains pertinent when assessing art value. If you find that you are purchasing works of art by an artist who does not show work with much frequency, be advised.
Good artwork is shown in exhibitions.
It is also true that works of art increase in value each time that they are exhibited. This is one of the reasons why major collectors are interested in exhibitions and relationships with museums and galleries. The artist whose works you are buying should be showing work not only in shows hosted by their dealer but also in regional art shows, area art exhibitions, juried art exhibitions, college and university galleries, community art museums, competitions, etc. There are many artist organizations that host exhibitions and feature the work of fine artists. Don't let anyone tell you that there are no good shows in which to exhibit work.