Well, you need to be running ppc ads full out. This is one of the best ways to get initial traction on Amazon.
What have you done so far with ads?
New pictures can definitely improve your sales a lot. They 10x'd my sales overnight, back when i was getting started.
+1
1. Optimize your listings for the highest possible conversion rate. Top notch photos. Clear benefits. Rock-solid Guarantee. Targeted title and description. Etc.
2. Decide on the highest traffic and most targeted keywords for your product - the ones you want to rank for. You likely already have.
3. Lower your products price temporarily (optional), and run manual PPC campaigns for these exact search terms, even if it's only $5 a day. Don't worry about if they're profitable - that's not what this is for. This gives Amazon specific data (CTR, conversion rates, etc.) that's critical to their ranking algorithm for these search therms, allowing you to rank faster. Lowering your price just boosts your conversion rate temporarily until you rank higher. You can turn off the ads after it boosts your rankings if you want.
4. Set up a great follow up email sequence with your customers to accumulate great reviews. Reviews make a huge difference in converting more customers. I send 3 emails offering to help with any problems, and asking for feedback/reviews.
Do all of these things, and I'd be extremely surprised if you didn't hit the $1,000 mark easily. If not, I'd recommend switching to a larger market if you've been at this one for a while, taken the necessary steps, and don't see a lot more sales.