Is it possible to predict what art is "sustainable" over time, and will see a good return for future generations?

A good question, but I must assert that there are some components that are very often critical to this, such as whether art is to be displayed in museums or in important collections.

The other query I am asked, questions the relevance of art and the artist, should a piece comment on the artist's place amongst their contemporaries and place in history?

In recent years, there has been much talk about graffiti, or rather street art. Formerly considered as vandalism, street art has earned its place as a respected public art, with (some) authorities turning a blind eye and politicians embracing it, whilst more and more gallery owners and art historians have acknowledged the emergence of this vibrant art scene.

One of the biggest international names in the street art scene, is the French artist Christophe Aghirre Schwarz, who goes by the pseudonym ZEVS. Born in 1977, ZEVS achieved international acclaim during the 1990's for his creations which adorned the streets of Paris. His name is a tribute to the RER A Zeus, one of Paris' five metro lines, as well as an acronym which translates as "field of the visual and sound experiments."

He is considered one of the first street artists who transcended and intellectualized the art form, which had long been labeled as absent-minded vandalism.

In 2005, ZEVS began putting his own creative spin on some of the most recognizable logos from brands including Chanel and Coca-Cola. ZEVS both honors and sabotages the symbols of these brands.

The logo series blurs the lines between the artists' detest for consumer culture, whilst simultaneously, highlighting how they can be catalysts for artistic creation.

The French auction house Aguttes currently has an outstanding selection of street art, check out a few here, click on the lot for more information.

Who knows, one might just be your next big art buy. Remember where you heard it first.