Honestly, since a lot of it is built on top of Bootstrap, which probably sped up your development time and would also speed up someone trying to replicate it themselves. I would say closer to the $15-$20 range would make it much more enticing to people who know about those other sites.

I really think that you might want to give it for free in a "Beta phase". Get some traction, add features and design and then charge for it. As said before there are much more robust themes for $10 more.

I'm going to take a counter argument here and say competition is already really high so if you compete on price you are heading toward zero quickly which is a price point that will generate zero revenue. Your alternative could be charging $50 (or more) and trying to optimize your marketing funnel with the goal being to attract those too lazy to search for another word press theme.

Going beyond that, non developers find wordpress to be somewhat difficult to implement, making it easy would generate additional interest.

Its easy to say "lower your price", but that has a probability of not working and simply lowering your revenue/profit.