to sell gifts?

[DeliaOliver]

Mainly kitchen shit stuff that has sat in it's box for over a year.

All from PIL's. They might ask about them one day...

depends what you're doing with the proceeds IMO

if you're going to replace the gifts with something more tasteful/useful/wearable similar, then carboot the lot!

No, not unless it is something cherished or an heirloom or something you might not like but it "feels wrong" ie giver saved up for it ect ect.
I dont think unused kitchen things come under this. You could always say that you needed an X and exchanged it for the Y they bought- they will never know..

Re-gifting is the way to go. My friend is hilarious. We all get together once a year and "show and tell" what she has given us for birthdays ect. Between 8 of us there is usually three or four which she has regifted from one of us to the other (she thinks that we dont know as we all live in different parts of the UK!!)