If you want it, buy it.
All variations of the Vario being "sold out" on the Helko web site could mean one of two things. That they were incredibly popular and they couldn't keep up with demand, or they were not popular and have not made more having sold out. I lean towards the second. Some are still available in the US and they appear to be priced at a point that approaches Gransfors there, despite what appears to me to be a much more production friendly construction method, that logically would translate into a lower cost.
I am dubious about the durability of the construction method. When I first looked, I assumed that the handle would be mortice cut and that the steel would fit into the wood, but from the better pictures on the US Helko site, it is clear that the blade and wood meet with a flat surface, two threaded holes in the steel and two holes drilled through the wood to take bolts. Stronger for the wood, sure, but not good for resisting any sort of shear or torsion between steel and handle. I know you are not meant to torque on the handle of an axe to pop wood apart when splitting, but embedding an axe in a log, picking it up, reversing and bringing the whole log down so the poll of the axe hits the chopping blow and the log is split by its own weight seems like it would impart all sorts of forces on the axe head.
Chris