Police are becoming increasingly frustrated with people who think they can make a quick buck through importing drugs over the internet.

This comes in the wake of the sentencing of two young Dunedin men to lengthy terms in prison.

19-year-old Mitchell Connor Dagg and 20-year-old Daniel McKechnie have been sentenced to three and seven years respectively for buying class A and B drugs off the internet and selling them.

McKechnie, the protagonist, set up a number of PO boxes around Dunedin using fake names, to bring in the drugs via websites like silk road.

He then got his friends to pick up drug deliveries from the boxes.

Detective sergeant Malcolm Inglis said they are seeing crimes like this more and more.

"People think they can make easy money across the internet where it's a faceless society, and it's an easy way to bring drugs in. But as we see they're serious offences with serious consequences."

Inglis thinks the sentencing of two young Dunedin men to stints in prison for importing drugs sends a sad message.

"There are no winners in this. The police don't want to see young people of this age in front of the court. Me, personally, I am sad to see 20-year-olds going to prison for seven years for stupid offending," he said.