The real reason is that this is a pink sheet stock so the market maker just skips bids and fills his own book. This is very thin. I was the seller of the 2500 shares only because I had something else I wanted to buy that day and I still have a large position which is not for sale. What happened to the order is instructive. First I had to offer it at a lower price than the offer, in this case .53, the last trade because otherwise I got a message saying offering at .25 was "too far from the offer". So I did that and actually 100 shares traded at .53, so then I simply change the offer to .25 and then .23 and the block sold. Reading the thread here suggests the market maker who is still bidding .23 wanted to fill his book for the next run up or to cover a short position? The irony is that it is both hard to buy and hard to sell such thin pink sheet stocks which is bad for all except the market makers, but all that will change in a flash when a deal is done, and I remain in the camp believing it will.