The first law of business rate setting is "charge whatever the market will allow". The people who look at what they need to make in order to pay the bills will never be rich, but they will succeed in de-valuing their products.

I quite agree with you, I have been experimenting with prices on some of my directories, on one directory, I raised the price so high to frighten people off as I do not have time for that directory, when I started receiving submission for that I thought was a grossly inflated price, after the 3rd submission I come to accept that that directory is worth that after all and I never lowered the price which was my original intention when I first raised the price.

Based on PR
Quality of site
Presentation

After the fourthcoming PR export I am going to sell text links. I will use the different link value calculator programs and multiply the result with 1,2. I'm sure the prize won't be low, but I don't care. If nobody will buy them I will put there my friends' sites

I think many people appriciate quality links so I don't think your link will be too expensively priced

In this case i will multiply that with 2


Just kidding

Well, I think you can try and see the maximum you can get, since your income is not dependent on you selling link, you can experiment

Base on PR, Alexa and traffic

I try to keep my prices pretty low, but the exchange rate and Paypal fees make it pointless to be too cheap.

PR is important to submitters, so that has some relevancy, but I also charge based on the unique category stucture and design of my directories. I rate links as being more worthy in a directory with a different structure.

The category dump common template directories are lowering standards IMHO.