Heres the players taken at pick 37 over the last 10 or so years and there's been some good picks. This years draft is admittedly weaker (apparently) but it still serves as an ok starting point for what we could be possibly giving up to get Maric.
2010 - 37 Geelong Cats – George Horlin-Smith

2009- 37 North Melbourne - Jamie Macmillan

2008 - 37 Fremantle -- Zachary Clarke

2007 - 37 North Melbourne - Scott Thompson

sort of
2006 - 37 north Melbourne - Todd Goldstein

2005 - 37 Collingwood - John Anthony

2004 - 37 West Coast - Mark Lecras

2003 - 37 Richmond - Tom Roach

2002 - 37 West Coast - Brent Staker

(sort of)
2001 - 37 St.kilda - Leigh Montagna

2000 - 37 Collingwood - Guy Richards

I'd rate the pick as 1 in 2 chance of a quality player. In this compromised draft, it may be more like a 1 in 3 chance.