Best way to buy MS Office?

I remember the one-off licenses were pretty expensive (€200-€300) and that was for a single install.

Yes, the subscription model is a pain, but you have a constantly up-to-date version of the app.

The cheapest I know of is you can get the legit copy for €69 per year as an individual though the Microsoft Store. You'll need to be signed in with a Microsoft account. You can then install Office on up to 4, I think, other devices (5 in total). You just need to be signed into the same MS account on those devices.

It's the whole package I'm afraid. I've not seen an option for the individual apps anywhere.

The Microsoft Store is an app on Windows 10 and 11, so just do a search for "Store" and it'll show up … This is the Win 10 version:

It's a poorer experience than the App or Play stores, but if you search for Office 365, you should be able to get the license and commence the install from the Store. You will need to be signed in with a Microsoft Account though, as that is what the license gets assigned to, so create one beforehand if you don't already have one. You can set it up on a Gmail account or other email account if you want … it doesn't have to be an Outlook or Live account.

On your other devices, then go the the Store, be signed in with your Microsoft account and when you look for Office 365, it should just be an "install" option, rather than "buy".

When I searched on Microsoft Store, it doesn't show up.

For some reason I can't access the Microsoft site you linked to right now, but I presume you can purchase the key for Office Home from it and download the package.