This from the DAZ 3d EULA...

"The 3-D Model(s) is provided for User's exclusive use. User does not have the right to provide the 3-D Model(s) to others in any form or on any media."

Understand this is intended not only to prevent illegal distribution but also to avoid the "Rent-A-Vicki" scenario Ajax pointed out above. However DAZ has always been, & will continue to be, willing to work with customers on an individual basis if unusual situations arise.

If someone is "getting out of the business" & plans to no longer use purchased DAZ material the easiest thing to do is simply contact the office for permission to pass them along to other users.

Note this does not preclude buying a DAZ 3d product as a gift ("User" can be the person whom the model is intended for, not necessarily the purchaser), however a gift certificate is usually a preferred course of action.