Street price: $300; MSRP: $300; Deal price: $250

The first good drop we've ever seen on these headphones, despite tracking them for a long time. It's rare to see any discount on these at all, let alone a $50 discount.

The HiFiMan HE400S are our pick for the best open-back headphones under $500. Brent Butterworth said, "Unbelievably spacious and natural sound—along with unusual versatility—makes these the only open-back headphone all of our panelists loved."

"The HiFiMan HE400S headphones were the only ones of all those we tested for this guide that every panelist agreed was worthy of our recommendation. Not only do we feel it (arguably) matches or exceeds the performance of any under-$500 headphone we tested, it's comfortable to wear and it's relatively affordable for about $300."

Street price: $300; MSRP: $300; Deal price: $250

This is only the second time we've seen a great deal on these headphones. We've had them as a pick for years, and the first sale we saw was about a month ago. This deal matches that low price. This is for the black Android version, which has a slightly different remote than the white Apple version.

The Bose QuietComfort 20 are our pick for the best noise-cancelling in-ear headphones. Geoffrey Morrison wrote, "The Bose QuietComfort 20 offer significantly better noise reduction than any other in-ear headphone."

For more detail about the noise reduction, "the main takeaway is that at certain frequencies, the QC20s drop the ambient sound by 45 decibels. This is an incredible amount. To put this amount in perspective, the average noise levels inside an airplane and a library are roughly 45 dB apart."

Street price: $50; MSRP: $60; Deal price: $40

This deal comes within a couple of dollars of the lowest price we've seen it before, and is the first decent deal we've seen in a few months. Outside of a lightning deal, this is pretty close to the best price you'll see on this slow cooker. This deal is only for the silver model of the Crock-Pot.

The Crock-Pot Programmable Cook and Carry Oval 6-Quart is our runner-up pick in our guide for the best slow cooker. Christine Cyr Clisset wrote, "If you find you need a timer that goes longer than 14 hours (which is the upper limit on the Set & Forget), we recommend the highly reviewed and easy-to-use Crock-Pot Programmable Cook and Carry Oval Slow Cooker. It does cook for 20 hours, compared with the Set & Forget's 14, and looks more up-to-date (because it is); we like its handles and locking mechanism a little better, too."

Street price: $106; MSRP: $200; Deal price: $90

Here's a decent $16 drop on our pick for the best dash cam. This dash cam has been featured in a couple of lightning deals before, and this sale matches the price from the last lightning deal. Since the last few notable deals have either been lightning deals or incredibly brief, it's unlikely that this price will last long.

The Zero Edge Technology Z-Edge Z3 is our pick in our guide for the best dash cam. Eric Adams wrote, "The affordable Zero Edge Z3 hits all the marks with great video quality in the wide 2560x1080-pixel format across a range of difficult outdoor light. Though the Zero Edge Z3 was a late entry in our testing, it impressed us with its high-quality video and build, which is on a par with dash cams that cost almost twice as much. It also includes a 32GB microSD card, making it an even better deal. Combine that with the best mount of any camera we looked at, video footage that is easy to see fine detail with, rock solid build quality, and easy setup, user interface, and installation, and you have a camera that easily beats the competition."

Deals change all the time, and some of these may have expired. To see an updated list of current deals, please go to The Wirecutter.com.