the price over market is variable between brokers.
I tried $50 all the way down to $15 -- all rejected, but $10 was accepted.
if you do this, watch them VERY VERY VERY carefully ... we all know how fast PTK can move.
ie, don't put up a GTC and go fishing for three weeks.
make sure you have enough headroom that a sudden unexpected pop won't take them out (unless that's what you really want to happen).
lastly, don't necessarily do it with ALL your shares -- you may be locked in to a place you don't want to be if there's a halt.
GLAL,
R.