My Best Grey Sheet play was CHAG. I'll never forget that one either. Guy named SlowFeet something on Ihub posted their 8K that morning, which was Ridiculously good but it was grey so no one knew how to buy it, a few hours later I got the first Fills!
Using common sense I just started to walk up my bids from .0001 level where it had last printed. .009 start filling and I chased it up to .02 and had 300K shares, which at the time was a big deal for me lol!
Can't pull up a chart because of the R/S but I thought CHAG was going to go all the way. The new CEO ended up in a fight with the Board and quit causing a default in their loan and the rest was history!
It was a .009 to .20 play for me that wasn't too shabby!