Appreciate the info, I knew nothing about this stuff.Technically it's referred to as 7.62x51 ammunition if it has the NATO making in the headstamp.
Here is a link to some in stock linked 7.62x51 belts of 100 cartridges:
https://detroitammoco.com/product/linked-7-62x51-for-browning-1919-machine-gun-2/
The bullet weight and cartridge use will affect the cost per cartridge.
If the buyer want to de-link the ammo, the little machines used can be costly these days.
Remember that some linked ammunition uses a tracer round every 5 rounds.
I'm ok in North Carolina, at least for the time being.In some (liberal) states they might be considered the same as an (illegal) high capacity magazine.
I'm just sayin'.