Used FPE Stab-lok service panel with pre-installed 100 amp main breaker
and 24 slots for branch circuit breakers.
 
Panel measures 13.5 inch by 19 inch, the panel alone is $40.
 
You can fill up the 24 slots with any mix of of breakers from 15 amp
single pole to 40 amp double pole for an extra $120,
 
All in good used condition, total for panel full of branch circuit breakers $160.