The prices quoted by the site you posted are listed as "UNC" coins which mean "uncirculated." I noticed this when I looked at t a 2010 US Cent was listed at over $1.20 and then I realized that they were listing UNC prices and even that is a high price for a 2010 UNC cent. The dug 5 ore coins will be worth close to face value which is a cent or two per coin.
Unfortunately (as you no doubt know living in Sweden) the Danish 5 ore coins are worth even less than the Swedish 5 ore coins as the Swedish krone has always been stronger than the Danish counterpart with the Norwegian krone being typically somewhere between the two. Anyway, hope this helps. I'd still go back and dig them all anyway since they are out of circulation and are just plain nice looking coins.
1960-1971 DENMARK 5 Ore KM# 848.1 value | DENMARK Coin Price Guide
Beste Hilsen!