hi Alan, I think you will probably know my opinion already, no point hoarding, just move them on and use money on something you and your mrs will enjoy more. even if its something as simple as box of chocolates
As to how to sell them, depends on how quickly you want something sold. When i changed gear/lenses a lot I held out for any length of time to get a good price.
Currently I know will use my lenses at least for 3 years, most likely 5+ years. I am much happier going with a dealer as in 3-5 years time the extra £50-100 won't make much difference but my mental peace thanks me now