Cheap Gravity Feed Brushes?

I have been using gravity feed Brushes from my school but want to know if there are any decent cheap ones that are affordable? Ebay seems to be going for about $80 or so but im looking for less. Any ideas ?

badger 100 lg w/ medium n/n: $50 or so

iwata hp-cr revolution cr: $60 or so

I just got a Paasche VSR90 for $59 at Dixie Art.

Omni 4000 for around $60 at Dixie Art as well. I really think your post title should be “Inexpensive” instead of “Cheap”. There is a huge difference [:p]

I second the Iwata HP CR recommendation. Many don’t think of inexpensive and Iwata together, but the CR is a really good value for the money ($65). it has a good quality feel, the trigger reacts well, and is easy to clean.

Omni 4000G is a great model brush