I disagree. I am almost guaranteed to use this in the near future because it's so ridiculously cheap. At $50, I'd think about it a lot more and probably attempt to do it myself. Are there more people like me, or more people who wouldn't use it because it's too cheap to trust?
- At $5, you could try it out & develop trust as appropriate. This isn't market research with a consultant who can guarantee anything. This is DIY & you decide for yourself what it's worth. There's room for both kinds.
- Neither 5 or $50 is going to provide high quality trustworthy anything. That's not the point of this. The point is something interesting & potentially useful at a price that means you don't need to think about it too much.
You're underselling yourself IMHO. Position your service as a more premium offering.
I'd do $50 for 50 comments. At least.