On holiday in Germany, we found that they regularly hold 'FREE markets' and also 'FREE repair days' - same in several European countries.
The Council let's the organisation have space for free, and on free markets, everything put on tables is just ... free. Help yourself- there are Charity boxes, which are optional.
And for 'repair days' you can bring anything to be repaired for free. They have experts in so many trades, with their apprentices, to repair stuff. Anything from kettles, laptops, books, toys cycles, whatever. If it can't be repaired, and it is very rare, then they will tell you so and explain why. Great idea.