There will be people, the executors of the will, that need to clear the house, however, much which is just $$$ to you will be heirloom grade stuff to them, with memories of happier times attached. Yet still, they need to realise the assets from the estate, maybe there are grandchildren with inheritances in that mountain of cruft left over after a long life.
Sure, there are things that just need to go, that the executors of the will would consider paying to get cleared.
As for getting things like the cables and power bricks that go with electrical items, chances are that the deceased was not doing a good job of keeping everything in order, they might even have a bit of hoarding going on. It is no easy job to repatriate cables with electrical items, that might have gone to the tip already, as e-waste.
There is also a tendency for men to put value on what most women will just see as e-waste. Similarly, with clothes, men see the whole lot as jumble sale trash, whereas women are more likely to see value in these items. I say this not to court sexist allegations, it is just that, if a woman clears the house, there is a slimmer likelihood of getting that lead for that obsolete electronic kit that somehow is considered valuable.
Sometimes the estate is too much work for the relatives, so the solicitor might get the keys to the house and instructions to get it all cleared. These are a minority of cases, usually, the relatives do pick through everything and put stuff in charity shops, charity shops that deal with big items of furniture, up to half a dozen 'skips' (British English term) and so on. I would say there isn't going to be a estate sale in these situations, really you are relying on the minority of sales where the solicitor gets the key, if you are going the estate sales route.