DB Systems has used equipment for sale from time to time.  All items are refurbished and tested to new specifications and come with a 1 year factory warranty.  Prices are approximate depending on the state of the unit.

As of Ja16 the following are available:

Single DB-6A-M mono amplifier, recent vintage (can be converted to stereo) 835
DB-1B Preamp 500 up
DB-3 Crossover, may be configured for various ways
DB-500e  Crossover--special 3 channel crossover with  24 dB L/R low pass (summed all three channels), 12 dB BW high pass, switch for Academy rolloff.  200 + psy
DB-3XL Switchable Crossover Front panel selectable frequencies of
50, 70, 100 and 150 Hz, 18 dB Butterworth slope, level controls on front,
rack mount, internal power supply. Custom built for dealer demos. Spec Sheet   595
DB-4B Pre-Preamp 280