A few other things to consider are this....

I would agree that ending in the number 7 seems to work the best.

I wanted to add this - if you are going to have a monthly recurring membership site then it is best to stay below 100. I only say this because if the "pain in the butt" factor.

Interestingly, I have had membership sites in the past that charge $17 for the content. And, I have people that have not accessed the site in years.

I have sites that charge $47 and have people that are still involved and will never cancel their memberships.

It seems that if you stay below the 50 price range for most membership sites then more people will stay with you longer.

Now, with this said - I am about to release $97 monthly membership site on driving traffic. So, I am going against my own advice (go figure). Haha.

Austin