As canbrit has said above, .de and .co.uk are very strong.
Likewise the spelling problems can mean seemingly great terms are not worth that much as in the UK they are either typed differently or have a different term.
The two listed for auction are utter rubbish and are reg-fee at best. There are lots of active .UK domainers around, less so on Namepros , for whatever reason. Those reasons extend to the live auctions, as the awareness of .UK is limited by those ok'ing the lists the quality is low.
Similarly there is little point for a UK domainer to sell a top name, for base USD$ when they can achieve better prices in £/E
http://www.domainprices.co.uk/Domain_Sales_Prices.php , Acorndomains etc are good for picking up information on .UK . The culture of the UK is also quite private, so sales data is more likely to be kept quiet and it is like getting blood from a stone to get people to make their sales prices public. That is good and bad as the public values would enhance perceptions of .UK, but would make things more expensive for domainers
It is worth noting the base price of .co.uk is £5 + vat, so pricing can be up (or down) from that.
