To get rid of toys?

[Sister77]

We are fortunate enough to have a room we use as a playroom.
I have 2 children 6 year old DS and 2 year old DD.
We have so many toys that they don't play with 70-80% of them. I am trying with my 6 year olds help to pare them down and donate them to a newly opened nursery in a fairly deprived area.

My DS and DH are moaning and groaning.
They play with ALL their toys, their toys are expensive, they NEED them.
I have dug my heals in and told them anything broken/jigsaws with pieces missing will be binned and some eg. Toy plastic mini animals, learn to walk musical walker (my kids can both walk) etc will go to nursery.
I know feel guilty and like I've wasted money (most are unasked for gifts and hand me downs from son to daughter).
AIBU to get rid? Just because we have the space do we need to fill it? WWYD?
(Sorry longer than I thought)

a family I used to work for had a weekend put aside every few months to have a sort through and bin anything broken beyond repair and the children got to choose which 10 (or 5 or 15 or however many) things they didn't play with anymore to give to poor children, the rule was it had to be something that you thought the children would really enjoy playing with. I think the plastic tat got filtered out sneakily when they were sleeping!
Then they took them to the salvation army shelter and gave them to the children there (they had a weekend where people donated clothes and toys and furniture and people who needed it, could come and choose and there were always children there who had been up routed and often had absolutely nothing)

It made them appreciate how lucky they were and they met the children who were going to get the stuff so it wasn't being thrown out. They started doing this when they were very little though so it was just "what they did" and it wasn't something to be sad about.

It was a way of making sure other children had toys and they had space for new ones.