Well, after all your help, I thought I'd update you all!
The good news: the stall took just over £200 on the day.
The interesting/hmmmmm news: Only sold one pair of the wooden earrings, and that was to my colleague who was helping. Did sell three or four pairs of cable earrings - three to one lady who couldn't decide on colour scheme, and we cut a deal on the three she was trying to decide between. Also sold a couple of cable bracelets, and a necklace.
We started with the wooden ones at £10, and the cable earrings and bracelets at £5, and necklaces at £8. At midday, a bit worried our prices were high, we changed to £8, £4 and £6 respectively, but that I don't think it made a difference. There were a lot of other stalls with jewellery of all sorts, and a quick look round suggested a wide price range, with us nowhere near the top end. Possibly it just wasn't a jewellery audience, or there was so much that people got choice-sick...
The big seller was my bike tyre belts - I made a dozen, and we sold the lot at a tenner each. That's cheap compared to the other sellers I've seen (velo-re do them for £40, but with additional decoration), but I'm still perfecting my technique. Interestingly, the people who bought them, and many of those who just looked, had never seen the idea before, and thought I'd come up with it myself. Of course, it would be the belts that sold - they take the most work the way I've been doing them, with chain links as rivets. In fact I have a commission for two more already, one from a colleague and one from someone who came to the stall when we only had one thin one left, and wants a more manly one for her husband.
So the bad news is, I don't have any left to photograph! I will be making more, and my friends at Bike Rescue are apparently happy to let me have old tyres, so that's a good source.
So. I'm a bit disappointed about the wooden earrings, but can only assume it just wasn't their day - also, I could work on displaying them more strikingly. Funny, since it's been those that everyone has said they like.
Talking of which, our other best sellers? Twigs. I asked one of the volunteers to make me a jewellery tree out of a real twig in a base, and when he'd done it (using dogwood for the coloured bark, and a sawn slice of a log for the base) it looked so striking we decided to make some extra to sell as minimal Xmas table decor. We sold 8 at £3 each, at least three of them to other stall holders who needed display material!
My colleague had been chatting to another stall holder who said she'd taken £40, so we've done pretty well. Attendance seemed good, but I suspect people were being careful with money, and there were lots of stall to choose from. The location at the racecourse is an odd one, out of town. I think if it could have been at the Guildhall (and it was a council run event, so you'd think they could have it cheap), it could have been rammed with Xmas shoppers.
Our next step is to think about how we can sell stuff on a regular basis - we have a tiny 'shop' area at the centre, but it's low footfall, so we're perhaps going to look at selling (or at least advertising) online, or seeing if any local shops/galleries might take them.
Thanks again everyone for your input and encouragment!