[flohofwoe]

I guess OP means you don't need to buy above or sell below its value when "buying" or "selling" a metric shitton of small coins (like you would for gold for instance).

15 kilograms sounds excessive though, I bet the bank clerks hate that trick ;)

[thfuran]

Banks usually stock pre-counted rolls of coins, and it's not much hassle to count out several of those. Though I guess 15 kg is probably going to be several dozen.