FPE Stab-lok sub panel for up 24 branch circuits,
Panel measures 15 by 25 inches. Panel alone is $40.
 
If you would like branch circuit breaks you can fill up the 24 slots
with any combination of from 15 amp single pole to 40 amp
double pole for an extra $120.
 
All in near to new used condition, total for panel with breakers $160.