Average costs are below for economical 9mm options price wise....if it costs more than below you are paying more than the base price
Reloading 9mm costs roughly $160 to $200 depending on components and wastage....(let's not get fancy with melting lead)
Aluminum case btw $199 to $229
Steel case btw $219 to $239
Brass case btw $219 to $259
115gr vs 124gr prices are very close with either being more expensive at times
147gr+ these rounds tend to cost more than 115gr & 124gr
Dealers closest to home can often provide the best deals I suggest shopping the sponsor vendors here as well. Ammo bin is a fair start but only with a limited # of dealers so far.