sorry to burst your bubble bro, but most people on here are from diff time zones if you didnt know so when they post it isnt always going to be the same for you. youll have to try it out your self. but ive made 2 sales threads there and posted around 12 am central time got some pms. by mid day in my time zone my thread was already pushed back a few pages.
the problem is that you can not bump a thread (although you can get a ban for something that is impossible)
so you need to hit when people are online to maximize sales.