Level-up Building Discounts?
this is the current one. each new level released, add 1 level to the left column and it's done click to enlarge
Forum Discussion
The buildings at Level 45 (for example) will decrease in price as soon as EA releases Level 52 because the multipliers will change. Level 44 buildings will have a multiplier of 1. Since a number x 1 is the number itself, and there are no multipliers below 1, its price will never drop again.
