A couple of things, and also tried a bunch of $1.99 Aliexpress phone app items, a some came up real winners.
The Amazon stuff:
This isn't an advertised special, but if you order Sonicfoam tips in the 20 pack, there's a business card in the box. If you send them a photo to the email address of your tips installed and what you think of them, they'll send you a free box (and they can be a different size than the first one, they asked that). It's just for new customers, but it cuts the price in half.
Topping A90 Discrete $509 used or brand new for $539 (buy with a credit card to double the warranty and it's worth it)
Sabaj A20h headphone amplifier $105 used or usual $119 new. I've had several of these, best value in amplifiers (digital volume, can power a Hifiman HE6se on the XLR side up to a -4db preamp reduction to EQ and still be loud enough for fun). The plugs are annoying in the back of it, but the look is clean. The little brother A10H measured really well here.
Even if it's not on sale at the moment, just got a six pack of these interconnects. They have a nice positive click into the DAC and flexible. Just long enough to use with mismatched stacks where the plugs don't line up exactly, so there's a little extra length to work with. They all passed on the multimeter and of course transparent as any other cable. My new standard for how much I'm willing to pay for interconnect cables...
GearIT XLR to XLR Microphone Cable (1 Feet, 6 Pack) $29.99
It's a $1.99 Aliexpress adventure! Using the phone app, it pops up a $1.99 sale each day (sometimes $1.79) with shipping on each item. These are the web site links which show full price, just to show you the exact item to look for in the phone app for the $1.99 price on them. I bought about a dozen things, and these are the winners:
Nintendo Switch Storage Bag
This in black looks great and terrific for all kinds of things. Just had to leave it to air out since it smelled like a car tire (that plastic smell) until the next day and then it was neutral. The silver one I got also has the Switch logo, but the black doesn't and very stealthy. They were out of stock for the hard case when I got the Hart Audio cable interconnect package, it all fits nicely in there with room for other stuff.
Type C Two in One USB Flash Drive Black 64G
I ran diagnostics and formatted a few times to make sure it wasn't one of those U-disk ones that you can't reformat at full capacity. Yes it's USB 2.0 speeds, but for music playback it's more than enough. Having USB C and A plugs is extremely handy for transferring to the phone from PC.
Some tools I use every day. The plastic ones don't scratch things up like replacing headbands or prying things out.
Auto Door Clip Panel Trim Removal Kit
21 in 1 Mobile Phone Disassembly Repair Kit
At first I was disappointed with the sound, but had to try them for $2. I then realized the tips they come with are really size small. I swapped them out for medium Final Audio tips and was really surprised how good they sound. On the Firetv stick the video and audio was synced for watching TV which I didn't expect for this price. I use them now all the time for washing the car or noisy days when the landscaper is rolling around on the 125 decibel lawn mowers. Not noise cancelling but isolating enough, also low profile and really comfortable. Only downside is with foam tips they won't fit in the charging case. Battery lasts all day, and stays charged for 2 weeks and the charger still showed 4/5 bars of power. No app is needed, and for phone calls it sounded just fine with the mic.
A6s Bluetooth Earphones TWS In Ear Bluetooth 5 IEM
Also got the Bluetooth 5.1 adapter which works great and the range covers a 2 story townhouse. Windows 11 found it instantly and no update needed.
This travel bag is nicer than I thought it would be. Great for throwing stuff into like IEMs or ear buds and a phone and cables. Not big enough for travel headphones like the Bose folded up, but for anything smaller would be fine.