2000 Nissan Xterra Head Gasket Repair's

Trying to decide if having a head gasket repair on a 2000 Xterra is worth the cost.

Background
Just started smelling antifreez in the last week or two. Very faint.
No noticible smoke or overheating.
Oil changed by myself 6 weeks ago and it looked OK. Dirty, but otherwise normal.

It's had a small crack in the passengreside manifold for about 6 - 9 months.

Gurage found a small drip of antifreeze comming off the back side of the passenger side head when it was up on a lift. Figured it dripped 1 ever few min.

No noticible loss of coolant and temp. Guage remains in it's "normal" normal position.

Dealership wants $1,500 - $2,000 for the head gasket job and $800 - $1,000 for the manifold.

Body, interior, and other mechanical components are all in good shape.

Your thoughts?