Updated where DARK RED 1st August 2016. Prices were unchanged.
Updated where INDIGO 6th December2017. All Prices changed.
Note that ordering has to be by product number, but product numbers are not shown on Nikon Instruments' UK website

Nikon UK do NOT ship to outside UK.
4X E CFI MRP70040
£90
CFI Plan 4X £143 nikon MRL00042
4x BE MRN70040
£33 2-3 weeks, European stock
£31 2-3 weeks, European stock
10x BE MRN70100
£52 6-10 weeks, Japan stock
£47 2-3 weeks, European stock
10x Nikon CFI E MRP70100.
£113 1-2 weeks
10x CFI MRL00102 (the gold one)
£194 1-2 weeks
All prices are GBP, + carriage +VAT (20%)
UK postage is about £5
Neither of these is the Nikon CFI, black, MRP00102. It's a different objective, which may not have been tested 'here' yet.
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Edit: AUSTRALIA try the local Nikon Agent:
http://www.photomacrography.net/forum/v ... 520#168520
AUS $ update: Revised prices as of 15 Feb 2016
4X infinty objective MRP40100 - 155 + gst + shipping (30)
10X infinity objective MRP70100 - 195 + gst + shipping (30)
Nikon agent now is ScopeScientific
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NB More than one vendor has been known to supply something other than what you ordered. They don't always know what they have. It may be worth pre-confirming.
For example, "E" and "BE" objectives are often confused. It's safer to use the correct part number.
Admin edit [rjl]: to make title more descriptive