I have a few more to add to my list looking at some of the rifles mentioned already I now consider rare

Air Arms Pro-Target custom! it's block is original but that's about it! super heavy over 20lb but it does shoot better then it looks!
tarted up by Hydrographics (cost more then the donor rifle) but worth it!

Daystate Merlin LE No: 6
I managed to get hold of 1 of these lovelies
I have no:6 in .22 there wasn't that many .22 done only a couple I think? I have only put about 10 shots through it since I bought it! wanted a nice silver bit of glass to go on top! which is on it's way over so it might come out a bit more once it's on top!

ATB
Daz