The whole thing hinges on what Keysight "sell" (or declare) the scope for anyway, surely? I mean if they sell it for 0 EUR then they make a business loss and there is no "Value Added" to tax? At most they can declare it at COGS (minus the 'S' because Cost Of Goods NOT SOLD are surely not subject to VAT).
It seems that KS can just stick any random value on the customs form, at no cost to them, and also no payment trail. Because you can always dispute a HMRC (or German Tax Gestapo) from their "valuation" of goods by proving you paid less for the goods imported. If KS "sell" a scope for $0, then surely that is a simple fact and no money has changed hands and tax authorities have no basis to "value add".
Of course, if you then go and sell the scope (as a business) the VAT will apply...
Hmm... I am minded now of the multi-billion carousel fraud that involved mobile phones that the EU bureaucrats seemed to invite in their ridiculous attempts at controlling markets...
#BREXIT - I love Europeans, but I hate the EU.