I have very few books out there, but a little experience with them. Dropping Arirang from $4.99 to $2.99 made no difference in sales. I think it is just too long - no one wants to read it on Kindle. They took the free promotion, but no after sales and no reviews.
I believe I have a new author for Ghost Orchid. In the transition, I have a Kindle version up and dropped the $4.99 price to $3.99 and recently had a free promotion. I see no positive results from the lower price or the promotion.
I have one story up at $.99 with few sales.
Sorry to sound so glum; however, in their "starter" years, both Arirang and Ghost Orchid had great and steady sales at fairly high prices (Arirang started at $35 - can you imagine!). Soon as PA dropped Amazon, Arirang's sales fell.
Ghost Orchid has been Page 1 on Google for several years. Suddenly it's dropped. I believe the closing of its publisher has pushed it off Page 1. I found Page 1 on Google has been my best sales tool - but I don't know what put it there! I did use every social networking site out there and tried to write something at least once a week.
I think the secret is to have a following, feed that following and branch out from there. Books in series do well once they catch on. I think people are becoming spoiled by the free and 99 cent books and shy away from anything but name authors at higher prices.
I'll be interested to see how Joe does with his 99 cent books.