With geysers, you don't need to land
Just have a probe Stardust type probe fly through one of the geysers sprays
to collect material then fly it home.
Of course it would be nice if by the time such a mission were launched we would
have the technology to perform in situ examinations of the material, saving time,
money, and other resources.
See the old Europa Ice Clipper mission plan for what this might be like:
http://www.astrobiology.com/europa/clipper/index.html