Group flying works for me.
Agree that in a large established group there are usually a number of almost dormant members for whom the initial buzz has probably died off.
Concerned regarding the "desperate" bit...
Groups really are like marriages and you must go into it with your eyes open because if things are not right then the initial love will wear off and you will be unhappy wanting an expensive divorce.
Just be careful... especially if it is a new group without any established history, there are some real sharks out there.
Even with established groups find out why the share is on the market... engine on an extension? Big bill on it's way?
I have heard stories of the same share being sold to half a dozen buyers and of aircraft that were really scrappers!