[Khartoum]

The sellers at craft fairs I trust most and purchase from most often are those who are sitting there making things. It's easier to match the quality of things there making against those they're selling.

It's pretty much the only way I can be assured they're not (exclusively) selling dropshipped items.

[derefr]

Only really works for some types of goods, though. Someone selling e.g. end-grain wooden cutting boards would require a very spacious booth to demonstrate their particular skill. Someone selling stained-glass pieces would require a fume hood to make any permanent progress! Someone making scented soaps? Legally, you need PPE to be within 50ft of the process!