When you go thru the inventory of presell pages you encounter a lot of different search engine specific stats for the domains. Altough you should already have an understanding of all those numbers when shopping here, here are some of them briefly explained.
here [1]
Q: While looking at the potential sites to advertise on, I do not know what trafic from alexa mean. If it says 4,000,000 in your description, does that mean it gets about 4 Million Visitors per month or is that the Alexa ranking. Please advise.
A: this is like the top10 music charts, but for traffic, so Alexa 10 means more traffc than 10,000 means more traffic than 10,000,000
These four indicators for a site are metrics you will only find PresellPageman.com - these are our own, internal metrics that we use to display more convenient numbers for a dozen other parameters we combine with it (you can also see these other parameters, but our metrics put our experience in "evaluating" those sometimes huge numbers)
The famous green-bar metric... this shouldn't matter too much for your decision for presell pages anyway, but we list the homepage's PR.
Q: Is the PR listed the PageRank of the page that our links would be placed on or the PR of the website's homepage?
A: Since your presell page is (most) always a new page it cannot be that of the page, so it'S the PR of the website's homepage.