Haglof has an extensive site with information on various tools. You will find it at
You will also find their product catalog as a .pdf file there to download.
Some 1-2 years ago I bought an increment borer directly from them, so probably you can get some price
information from them by emailing them or by calling by telephone.
The Swedish company Skogma has openly published prices for various tools. You can find them at
The price of an increment borer is some 150 Euros.