I searched and didn’t see this posted. I just picked up one of these yesterday at Target for $39.99 and was able to get the $10 back today. This is a 2021 release. The remote has voice and volume control.
The Roku Express 4K+ is on sale for $10 off it’s normal price of $39.99, bringing it to $29.99. Walmart happens to sell for $39.00 normally, so technically is the cheapest at $29.00, though multiple retailers have it for $29.99 (e.g., Target, Best Buy, Amazon, Roku’s own site).
https://www.walmart.com/ip/Roku-E…/217956994
Also can be found at these stores for $29.99 (probably others, too, as this seems to be a universal sale):
Target: https://www.target.com/p/roku-exp…nk=sameta
Best Buy: https://www.bestbuy.com/site/roku…Id=64495
Amazon: https://www.amazon.com/Roku-Expre…0916TKF
Roku: https://www.roku.com/products/rok…ss-4k-plus
Note that Walmart also sells an exclusive "Roku Express 4K" (no plus), which is a bit cheaper, but the remote lacks the voice control and volume button. Right now, the 4K+ is actually cheaper than the 4K by $5 while this sale runs. It’s not a huge savings, but 25% off ain’t bad.
Last note: check your Roku offers if you already have an account. I signed into my new Roku yesterday and had an offer to buy an Express 4K+ for $25, but YMMV on that (and it was limited to one per account).