The website states the following:
"Question: Why you do not accept group buys?
Answer: We have an experienced and dedicated customer support team that is able to provide a high quality service. They are qualified in handling and fixing all matters that might arise. Direct contact with our customers will also improve our products and customer service.
We also believe that a random person from the internet that organizes a group buy is both not qualified to handle customer support, shipping matters including local customs and might also not be trustworthy to receive all your money, forward them to us and distribute the merchandise to you. If we would accept a group buy and anything goes wrong with it, although legally we won't be responsible for this, our customers will be unhappy.
For these reasons we strictly prohibit group buys"
http://www.blackarrowsoftware.com/store/frequently-asked-questions.htmlThe more worrying part is the 10% charge for trying to do a groupbuy,
"Group buys: Group buys are not permitted. We will cancel any order that we discover that is a group buy and will refund the payment minus 10% that we will charge for our time wasted in this matter. By placing an order for this item you agree with the above."
http://www.blackarrowsoftware.com/store/prospero-x-3.html