Walmart.com has it listed at $29.83 but just tonight I was in Walmart and did a price check and it rang up at $19.00. It was a little more than that since we have 6% sales tax. I don't know if there is a price drop on the Switch version but as with everything it still probably has Nintendo tax.
I had a little bit of credit so I decided to use it and got the game for just under $9. Obviously we would want to get it as cheap as possible and who knows if it will drop to $15 or $10 in the coming months. I've been thinking about it for a while so I just bought it because it was under $20. Another added to the backlog.
(Edit: Now it's $27.20 online so it may drop to $19 online tomorrow.)