I've had a very similar experience. I sell 1 game for $1.99 and two others for $0.99 each and I was at a steady 7 for a couple weeks right after launch, but no

I've had a very similar experience. I sell 1 game for $1.99 and two others for $0.99 each and I was at a steady 7 for a couple weeks right after launch, but now I'm at around 15-17 per day on the $1.99 app, and the others trickle in every day too. My apps have only been in the market for about 60-70 days. The free versions of 2 of my apps have been downloaded about 10k times each, the puzzle game is only at 4k, and not many purchases, but I think it's picking up steam as well. It's been fun, and keep in mind that my games are not graphically awesome, my skills are not in that arena, but my games are fun, and it seems like they are picking up steam. Odd side-note: My most downloaded game gets a lot of hate from comments and ratings, but still plenty of buyers - so even though I think I need to change it, the people who buy it love it as it is, so there's not much I can do :)