Grayscale Moog 914 Fixed Filter Bank - Eurorack Module on ModularGrid
This is the Doepfer A-103. At $109, it is one of the cheapest fully fledged Eurorack filters. It is an excellent 18db transistor ladder with progressive overdrive on the output state and
MATRIXSYNTH: Aion Modular 904A Moog Filter in Eurorack Format
Moog Music Mother 32 Tabletop Eurorack format semi-modular synthesizer - Vintage King