Hey Th3Gi4nt,
it’s all about the cost-benefit analysis - Is it cheaper to buy it or to code it on my own you know …
So, for a price you should think about the hours you needed to create the system (without all those configurations, common users want to have), calculate a price out of it and reduce it to ~1/8. It should also fit to the general prices on the marketplace. I mean … your goal is it to hit a bigger majority.
But in the end I would buy it for a good price and good quality.
Cheers