Lindsayt, you've got to be realistic, mate. You won't get the Garrards for much below £5 - £600 without arm. The Lencos need rebuilds to be good. EMT and AEG go for big money and are as rare as hens teeth. The pioneer P3 is equally rare and hyper expensive, owing to the fact it's one of the best turntables ever made. I'd be stunned if you found a Commonwealth in this country, they're OZ broadcast decks. Micro Seiki doesn't come cheap. Neither do the Revoxes you mention, plus they are so complex any problem spells doorstop. If you think you can find an SP10 or TD 124 at reasonable money please say where, wouldn't mind them myself. As for aThorens belt drive at under £100, that was about 5 years ago. Still great turntables, mind, and my choice if I had any vinyl.
About the most sensible suggestion in that list is the Technics SL1210, and they're a difficult secondhand buy because many are DJ decks and could be stuffed. If you find a good one, though, you need to spend a lot to get better.
Out of curiosity, how many of the turntables on your list have you heard? I'm curious about the Aiwa and Kenwood one you mention.