The prices would be as follows:
$7 for every 20 plants (1 order = 20 plants)
plus $7 shipping, shipping price stays the same no matter how many plants are ordered
I have a lot of these, so you may very well get generous bonuses!
*edit 3-23-15: Purps are now in their 3rd season and are tri-yearlings. Growth has not started, so they are still 1-3".
Northern Ohio Predaceous Plant Society
DM for PO Box address.