No, base price is a FIXED number whose apparent function is to determine the range market price fluctuates. It would have some relation toward the cost of production, but it has always been a FIXED, unchanging number (barring game updates).
Anyway, Navy Missile Interceptors on FB show the bottom range (consistent surplus):
Base Price: $9.9M
Market Price: $4.4M
Market Price is currently 45% of Base Price.