Once upon a time I had a stock move to the grey market. It was only temporary for about a month. But I was still able to buy some cheap shares. You have to be somewhat lucky as a trade usually can't be made unless there are 2 exactly matching orders on the bid and ask.
At least that's how I recall it working. TDA was able to give me a bid and ask price which helped a bit at least.
They probably won't do that anymore for grey market stocks. jmo
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