affordance - Order of prices and effects on sales

Consider the following list of prices:

                  Plan A    Plan B    Plan C
                  ------    ------    ------
                  $50/mo    $40/mo    $30/mo

Is it more effective to list the prices low-to-high or high-to-low (when reading left to right)? (Assume also, that the higher cost plan is the sales-target)

Answer

Following shows screen-shots of different sales price comparison plans..

http://www.webdesigndev.com/inspiration/25-clear-and-beautiful-comparison-tables

Key thing is to distinguish the plan that you want user to select by putting a lable "Best" and/or "Recommended" on top of the column header and providing list of features in clear text exclusive to the plan ( e.g. in your case $50 plan )

also making the default selection in different color catches user's attention on reading the information about that plan..

take a look at godady plan comparison page

http://www.godaddy.com/hosting/web-hosting.aspx

Edit:

Also converting prices from 50 , 40 and 30 to 49.99 ,39.99 , 29.99 helps

http://en.wikipedia.org/wiki/Psychological_pricing