No, but ROHS compliance does. That and the components no longer being manufactured.
Speaking of which, has the Mediator TX been updated/redesigned to be RoHS compliant (lead-free components, but also regarding the plastic connectors)? At least on the upper side of the PCB, there is no "trashcan" symbol visible. Comparing the pictures of the SX and TX, the board is exactly the same, with the same components, and especially old chips with DIP/DIL packages are hard to find RoHS compliant nowadays.
So maybe Elbox could confirm the RoHS compliance?
It would be sad if this expensive piece of hardware couldn't be sold within Europe legally.