Ooh, can I play?
1) Both prices are hideously underpriced. There is no difference whatsoever between $5.99 and $9.99 to anyone who has to type in a credit card, so repricing that would double post-fee revenues almost instantly.
2) You critically hit gamers -- who have the attention spans of ADHD squirrels hopped up on crystal meth -- with a wall of text just to get them to make a purchasing decision. You can check this with analytics, not one gamer in a hundred will actually read this argument.
3) The availability of software at $3 compromises any notion of it being valuable. You will not sell software to poor Africans. Do not price to be affordable to poor Africans. (If $6 is too expensive, $3 is not affordable anyway.)
4) Cost-based pricing. Don't mention it. Don't even think about it.
5) Sales work because they are scarce, time-limited events and they effectively segment customers who want the game today versus customers who want the game at the lowest possible price. Its a reverse auction, just like book publishing, AAA games ($60 ~ $70 on release day, $20 in a year), MMORPGs (pay for the box on release day, it will be free within a year), etc.
6) Showing your customers being penny-pinching lameos gives people social license to be penny-pinching lameos. It is like the broken window theory (evidence of anti-social behavior causes anti-social behavior), and you're breaking your own freaking window! If you wanted to highlight this, you would do something like I suggested for the Indie Game bundle here: http://news.ycombinator.com/item?id=1318841 -- give people options and highlight that the correct option is most popular without dwelling on how many people make the wrong choice.