21. A knife of exactly the same proportions would be legally a weapon, thus prohibiting free sale . 22. BAA's attempts to expand into duty free sales had not been popular with its institutional investors. 23. The strike is over the proposed ending of duty-free sales in the European Union next year. 24. Many airlines, such as Delta, and Avianca, offer duty-free sales on their flights. 25. Whether viewed as a boon for consumers or a bust for industry, duty-free sales are soaring. 26. It also is fighting to end duty-free sales , saying these give the ferries an unfair advantage. 27. They claimed cutting back on tax-free sales will push up the cost of travel and increase unemployment. 28. Irish Finance Minister Charlie McCreevy said the campaign to save duty-free sales within the EU will continue. 29. Amsterdam's and London's efforts to increase tax-free sales has brought them new business overseas. 30. Ferries currently rely on duty-free sales for much of their profits, allowing them to subsidize cheap fares.