I'm unclear as to whether you mean "Flabbergasted" that it's worth more, or flabbergasted that it's a good amount?
If you mean "worth more" - well, maybe, but at the same time, you can only make as much as the market will yield.
If you mean "worth less" - $200K over six months is OK, but not great if you realize that there will be likely six month period (one year periods?) where revenue will be very low.
It's very boom/bust, and the $200K made here needs to go a long, long way. All in all, you would probably (more than 50% of the time) make more money providing desktop support than trying to sell software (or games) as an independent entrepreneur.
Of course, some times, you hit it big, and it makes all the sweat and toil worthwhile.