There are trial versions for Notes,Domino and SameTime, but none for Quickr and Connections.
As I can understand that these products are quite complicated to install, I don't think that this should be a reason why there should be no trial at all.
In many SMBs it works that way that the administrators are often the initiators for the purchase of new products. However many of them don't suggest anything before they did not have hands on experience with it.
PS: Oh and the "Sametime Gateway" could also have a trial. If someone tests a product, he wants to test all functions.