I can only speak for the UK, so all these figures only refer to here. If you get hit with charges at all then they will be:
Import Duty 5% (although depends what code HMRC use, could be anywhere between 4 and 6);
VAT at the standard rate (20% in the UK);
Handling charge - either £8 or £13 (if you go for the 4 day service it will be the latter).
So assuming today's exchange rate for £/$ that would be:
Gimbal cost: £235
Import duty: £11.75
VAT: £47
Handling: £8 (if choose slower option)
So the cost EX SHIPPING (because that'll be different depending on what service you went for) £301
Shipping options at current exchange rates are either: £12.12, £30.31 or £45.47
Or you could get lucky like one user reported and get the parcel without any customs charges or import duty and therefore have paid only £235+shipping.
Comparison prices:
Dronexpert: No import duties, they apply Dutch VAT @ 21% at source. 549.34 euro delivered. At today's rates: £458
Taco-RC 3d printed plug and play: With "expedited" shipping $299.90
Gimbal cost £182, Import duty £9.10, VAT £36.40, Handling £13, Total: £240.50
So it's a question of choosing your favoured price point, delivery lead-time, construction material, mounting method, upgradability and accessories availability, whether you want it tuned out of the box, portability... the list goes on.
Pays your money, takes your choice! But very approximately it's about £100 all in between Taco and Rotorpixel, then another £110 to Dronexpert (assuming in all cases you get charged the fees you should. One lucky punter got his Rotorpixel for less than the price of a Taco one with all charges...)