Value of Settlers of Catan Games?

Question

I have:

Settlers of Catan (opened and well used)

Settlers of Catan 5-6 Player Expansion (opened but never used)

Cities and Knights (opened and used once)

Cities and Knights 5-6 Player Expansion (never opened)

Seafarers of Catan (never opened)

Seafarers of Catan 5-6 Player Expansion (never opened)

What value do you think there would be in selling all 6 together?

Answer 1

Based on trading/buying history on the Board Game Geek:

Settlers of Catan (opened and well used) - $18

Settlers of Catan 5-6 Player Expansion (opened but never used) - $15

Cities and Knights (opened and used once) - $23

Cities and Knights 5-6 Player Expansion (never opened) - $13

Seafarers of Catan (never opened) - $25

Seafarers of Catan 5-6 Player Expansion (never opened) - $12

So, I'd say something in the neighborhood of $100 for all of them wouldn't be an unreasonable expectation.

Happy gaming!