$1000-$1500 reseller, personally I really like the domain because I'm a huge fan of Japanese culture and I know this fish is a MUST in japanese gardens, which UK has enough.
There was a massive interest in the UK in Koi-carp years ago, including my brother who spent an absolute fortune on the right habitat/pond/waterfall and not to mention the bloody fish that hardly move an inch. It's one of those subject matters that only needs an up' in the popularity again to be a great domain.
seek out a UK Koi carp specialist I bet they would love the domain .