Klement's Night, a striking original work, had a price tag of $7,500 and was sold. Even in this photo you can see how the brick section looks closer than the grey of the painting. This is more pronounced when looking at the actual painting. There is something in the simplicity here that makes it special. Discussing this further might lead to mumbo jumbo about using space and the like.
Dumitrescu's surreal, dreamlike watercolor/gouache, We're Still Searching, made me think of Dali. Of course the style and detail are quite different from Dali but there is something surreal (using the term in its dictionary definition here) about the painting.
Butterfield's horses are always pieces that stop visitors to shows. They are of varying sizes and made from various materials (often wood).