VSL (and in the US, Ilio) are having a buy-three-get-four voucher deal.
If you want to buy VSL's pricey pianos, a good strategy can be to buy vouchers when they're on discount, then use the vouchers when the VST you want is on discount.
(Of course, that still won't get you una corda 😉 )
https://www.ilio.com/products/vienna/vienna-access/vouchers
https://www.vsl.co.at/voucher