Well stated and agree.
It may be additionally helpful if you share your general geographic location (City, State and/region) so any members, or visitors for that matter, that may read this thread and HAVE interest (or may know someone with interest) would have that much more information from the start. For example, SuperSevens aren’t small or light so shipping will be more involved than a smaller speaker.
Also, should we post interest information here or how do you prefer to be contacted? Do you have selling or buying history/feedback on any other forums or Audio focused marketplaces you could share as this type if info is generally “the basics” for listing/selling things online.
It’s a very caring and thoughtful thing you are doing for your wife by handling this, kudos to you.