About 2.50€ here in Spain...
How much ice cream?
The cheapest are 2L tubs of neapolitan ice cream for about 33 NOK ($4/€3.30), that is made with proper cream, if you go any cheaper, there is vanilla ice cream made with milk and artificial vanilla flavoring, it's not very good but it's suitable for milkshakes that you are adding additional flavoring to anyway (like bananas or coffee)
Other flavors of 2L tubs cost 50 NOK ($6/€5) and there are a few flavors, like krokan (caramelized sugar), pistachio, premium vanilla, and maybe chocolate.
The 2L tubs are decent quality but they have more air whipped into them than the more expensive ones so you are getting less ice cream than it seems.
Premium ice cream ranges between 65-80 NOK $7.80/€6.50-$9.50/€8 and the tubs are 0.9-1.2L. There are a lot more flavors in this price range including a really tasty chocolate and cookie dough one that I like buying.
Pint sized tubs can be found, they are not as common though. Haagen-Dazs and Ben & Jerrys are priced around $10.50/€9 which is way too expensive for a pint of ice cream IMO. I never buy imported ice cream. But the locally made pints of ice cream are still overpriced at like $8.50/€7. I don't buy those either.
Scoops of ice cream at ice cream shops I haven't bought in so long that I'm not sure what they cost now, but the ice cream sold by ice cream shops is not home made, it's mass produced like everything else, they just have a different selection of flavors, the quality is not necessarily higher.