My advertising for Stray was a moderate success with a nice spurt of thirty-odd sales in a few hours shooting me up briefly into the sub-rankings (once you get in the top 5000 or so, you start appearing in various sub-genre lists).
With the promotion advertisement past, I'll be reverting prices mid-July, with Stray and Lab Rat going to $2.99 (my "first six months" price) and Medair, Champion, and Stained Glass Monsters will be $4.99 (my standard price). Price and your chances of selling as a self-publisher are really impossible to predict - some people won't pay more than $0.99 or $2.99 for a self-published author. But many do - and some don't even look at books priced that low, on the "you get what you pay for" philosophy. I'll stick with my current system, with the occasional month-long special for promotional purposes, which should capture both markets. Or not. Thinking about covers is much more fun. :)