For Sale / On Sale

[Bobbert]

I got confused the other day trying to say the following:

These rings are for sale (are being sold right now; you may buy one)
Estos anillos están a la venta
Estos anillos están en venta

These rings are on sale (are being offered at a reduced price)
Estos anillos están en oferta
Estos anillos están de rebaja

Are my sentences correct? Are there better ways to say them?

[aleCcowaN]

:thumbsup::thumbsup::thumbsup::thumbsup:

[Bobbert]

Thank you, aleCcowaN.

[aleCcowaN]

You're welcome. And thanks to you, as your examples leave no doubt about how to use for sale and on sale in English.