Her needs are a fraction of the equipment's ability, and always thought the two should be matched
Then sell it all - what a waste of good equipment - sell it to someone who can appreciate it for what it is and get something aesthetic looking that matches the apartment decor. Sonus Faber comes to mind - beautiful cabinetry. Sounds like this stuff came from a divorce or husband passed away perhaps - nobody who carefully selected that kind of gear/system would think to sell it all and then ask someone else what they think they should buy in order to have money left over...that is no audiophile kind of talk.