Blaster Master Zero sells around 10€.
The other day I bought Shantae for 11€.
What type of game do you like?
I am mostly into Metroidvanias, but I prefer the nice ones. If Momodora 4 releases on Switch I would buy it again.
No idea about their prices but if you are into them, then check what I said above and also Cave Story, Teslagrad, Axiom Verge, etc.
PS: I still don't get Shovel Knight because I want to pay 15€ for it, 25€ seems too expensive for me.