If you want cheapies like that, imo the best way to do it is set a GTC all or none order and don't touch it.
When you set an order, move it up, move it up again, and so on, they won't give 'em to you.
It is too funny watching people put bids in, then move 'em up, move 'em up again, and then eventually hitting the ask.
Be the bid, and if you have 10 grand or so, put in a GTC AON order at 18-20 and I think you'll get filled.
I didn't get any 19s, but I got 20.25s a couple of weeks ago when people were paying 22 and sold them the next day when antsy bidders kept moving their bids up.
"It's always better to be out wishing you were in, than being in wishing you were out."