Hey,
I make my own jewellery and tend to just search across the internet and shops for what I am looking for or what I need.
BeadsDirect - Is a good site.
SpoiltRotten - Is also a good site.
They do do findings, but you can probably find them cheaper - Ebay might be worth a look. =)
1. Do you buy hand made jewellery?
No, but I do make it! =)
2. How much on average would you pay for a hand made pendant?
I know from when I make them, they are worth about 10 - 15 pounds due to materials, that's without adding anything on to make any money!!
3. Leather thong or chain?
If it's a big pendant, then the leather. I do prefer chain though, but only with little dainty pendants, I don't wear big things though so I may not be the best person to answer that!!
4. Do you think it is important if the bail attached to the glass piece is sterling silver or would plated silver be as good?
Sterling silver is usually better as less people react to it - so more people can buy and wear it!!
BEST OF LUCK! xx