Example

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Across
  1. 4. public information about an event
  2. 6. arrangement of items for sale
  3. 8. money earned from selling
  4. 9. box for collecting items
  5. 10. activity to attract buyers
  6. 15. activity to clean items or area
  7. 17. use something more than once
  8. 18. something sold cheaply
  9. 19. reasonable and honest price
  10. 20. grouping items by type
  11. 21. gathering items or money
  12. 22. repair or improve used items
  13. 24. items that are not new
Down
  1. 1. giving one thing for another
  2. 2. organized social action
  3. 3. good for the environment
  4. 5. duty to care for others
  5. 7. something given to help
  6. 8. use again instead of throwing away
  7. 11. wrapping items for sale
  8. 12. made by hand, not machine
  9. 13. done by choice, not forced
  10. 14. understanding a social issue
  11. 16. used by someone before
  12. 23. paper used to promote an event