Possible Clues:

• By the sound of it, not the whole of the sale for the trade
• Sell off 8, on leaving it
• Sell (goods) to public
• Business for blind mice as customers
• Outlet type
• Stores, markets, etc.
• Store-to-consumer business
• The trade serving the public
• That's about the end of it, but not the whole sale of, it
• The whole sale is about the end of it (6)