NSAV Holding Inc (NSAV)

[shotsky]

You're right.
Worse yet, MM's have a spread and a quantity, like this:
Bid x Size...$0.01x 10000
Ask x Size...$0.011x 10000
What that means is that, if you offer your shares for sale at market, the MM's must buy them at $.01 - but only a quantity of 10K. THEN, they can lower their bid and change the quantity if they want to, and they WILL, since this is how they make money.
Since it is at market, it is instantly bought at the new, lower price for THAT quantity. Each quantity that they buy is called a tranch - a complete MM transaction. There can be many tranches in one seller's sale, racheting the SP down the whole time.
I demonstrated this a few months ago, just to PROVE exactly how selling at market drops the SP. The last shares they took were much lower than the first ones, but it was all one sale, by me.
If you set a limit, there is none of this nonsense. You set your limit and wait for the SP to meet your limit. I set my buys up with limits too, because I know idiots will sell at market, drive the price down, and get me my price.