too, am a lead hoarder. And I've realised that I don't care.
As substance addictions go, it's benign enough. My fellow addicts make for diverting and improving company. I have an outlet for my magpie instinct, as well as my creative urge. It promotes contentment while encouraging endeavour. It teaches me to enjoy the journey as much as the destination.
It's more than an addiction, it's a lifestyle. It's mine. I love it.

Well said Sir.
Further to the 'just couldn't give them away' figures. I put them in boxes/tins and bury them at every opportunity:-
Under the patio; in the bottom of the hole for new tree or bush; below boards in the loft etc. etc. It will either be a surprise to future owners or drive archaeologists crazy in centuries to come.