Also 6.40% month may be the history but lots of people only use these when no other option to buy is available, fees are often higher than say buying from a exchange or friends.
2 way machines would be the way to go, we all need fiat sometimes.
In ABC Serrano ATM is one Lamassu but don't work well because scanQR is frozzen very much time.
I tested ATM than build BTCPoint and buyed one for install in Girona. Now testing ....
Now I think now than best is BTCPoint ATM model.
I know than buy 5 ATM price is aprox 50,000 euros but all need think than ATM need bitcoins and euros inside for begin work .... XD
Yes now profitability is 6,4% month with one ATM and my work in LocalBitcoins but when new ATMs work payment must incresase !!!
My plan is begin for sell bitcoin 5% fee and for buy bitcoin 3% fee. Total 8% but I need to pay any expenses to shop owner and economic manager for example. Also can be losses with exchange prices.