As of June 1 2013...
Unbuffed Workyards:
1) Recycling Plant 5 - 1.450gc/hr ... 2) Hunter 5 - 1.328gc/hr ... 3) Marble Mason 5 - 1.133gc/hr
Workyards Buffed with an Aunt Irma's Gift Basket (2x for 9hrs):
1) Exotic Wood Sawmill 5 - 6.217gc/hr ... 2) Gold Smelter 5 - 3.567gc/hr ... 3) Friary 5 - 3.547gc/hr
Workyards Buffed with an Exotic Fruit Basket (3x for 18hrs):
1) Gold Smelter 5 - 8.017gc/hr ... 2) Exotic Wood Sawmill 5 - 6.167gc/hr ... 3) Coinage 5 - 4.667gc/hr
...
As of May 1 2013...
Unbuffed Workyards:
1) Recycling Plant 5 - 1.400gc/hr ... 2) Marble Mason 5 - 1.367gc/hr ... 3) Hunter 5 - 1.218gc/hr
Workyards Buffed with an Aunt Irma's Gift Basket (2x for 9hrs):
1) Exotic Wood Sawmill 5 - 6.467gc/hr ... 2) Friary 5 - 3.787gc/hr ... 3) Recycling Plant 5 - 2.267gc/hr
Workyards Buffed with an Exotic Fruit Basket (3x for 18hrs):
1) Exotic Wood Sawmill 5 - 8.278gc/hr ... 2) Coinage 5 - 7.778gc/hr ... 3) Gold Smelter 5 - 5.228gc/hr
...
*All results are based on net value calculations*
For up-to-date results of all workyards, follow this link http://tso.majordesigns.ca/US2/value_calculations.html