I quite agree with Martyn's comments. I spend hours flitting around charity shops and was delighted to find an array of fantastic studio pots in my local two weeks ago. And they really were rather good - a nice mastery of form and some very interesting (on one or two - complex) glazes. Turning them over revealed that they were all inscribed 'Doreen' - possibly some local deceased lady, unless I have forgotten something!
As regards value, they were in great condition, may have had some age, and are probably quite rare - but as for desirability, it'd be really rather low - certainly as compared to major names like Rie, Coper, Cardew, de Trey or even Troika. So I guess the ?10-20 prices were quite right. Still, I added what I considered the best to my collection, and also use it for carefully placed knick-knacks.
Who cares who Doreen was, it's a cool thing and she had some talent!
Mark
www.markhillpublishing.com