You should set up a split test for each of your major traffic sources.
You may find that type-in traffic converts better at a higher price, while review traffic does better with a lower price or similar findings.
It's important that you also measure the value gained from increased sale price vs any drop in retention.
What you find works best for your site may well not be the answer for other sites.
I am continually amazed at what works for what site.
There are some sites that we have been able to raise the price on and actually INCREASE conversions, without affecting retention.
On other sites, we have found that the drop in retention wasn't worth the increased membership price.
For some sites we have found that offering a higher price to type-in/index visitors works well while allowing affiliates/linked traffic to see a lower price.
The key takeaway here is test & measure - don't guess and hope.
Make sure to send enough traffic to be statistically significant during your testing.
Here is a link to a free spreadsheet to help you
calculate sample size based on conversion ratio