you need to understand what trading on the grey market mean. it's a matched market. mm's are prohibited from making a market. there is no bid or ask. there is also no incentive for an mm to spend time trying to find a match for your trade. mm's make no money facilitating these trades. most trades are done within a brokerage because it's easy to see what the orders are. if you really want to sell, call your broker and ask them the size and price of orders they have in house.
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