Not sure how many of them are actually "sale" prices, vs prices that have been lowered after raising them to make them look like sale prices, but there are a fair number of useful cheap items on Aliexpress at the moment, supposed to be going until Dec 5th.
I found a few ebike and bicycle related items that could be useful, some of them at pretty good deals, such as some Avid BB7 calipers (almost certainly clones) and kits. Though it's always hard to be sure you're not getting a counterfeit (and thus possibly unreliable) item, there's a new problem that makes this worse:
They have changed their system so that reviews and ratings are no longer for the item you are actually looking at. They are now stated to be for items that are "similar" to the one you are looking at, sold by anyone on the site. So you can no longer tell whether any item is good, bad, or even has ever been reviewed at all, which makes it very unsafe to buy anything at all there anymore. The actual phrase they use is "The reviews displayed are from various sellers for similar product in AliExpress."
I had a bunch of cheap crap in my cart I was considering for the Snuggles The Wolf project (mostly servos and the like) until I saw that notice under the reviews on an item that seemed like a particularly good deal. Since some of the parts I want would be far outside my budget (of zero :lol: ) any other way, I'll probably get them anyway...but if I had any affordable trustworthy source I'd use that instead.
It's also very hard to actually get to specific items, since a page may show you an item you want to see more about, so you click on it, and instead of taking you there, it may take you to a completely different "deals" page that might, somewhere in the thousands of things on it, contain the item you were looking at...but since it only loads a few of those at a time as you page down, and you can't search it, and eventually the page will crash before it ever finishes loading all the items (after a few dozen page scrolls usually), you can probably never actually get to and purchase that item you first saw, so it might as well just be a scam.
Note that if you can figure out (via full item names / etc, urls and item numbers) which item you're looking at on a page, you may find that identical item on a "sale" page with other items for cheaper (sometimes a by a lot), but restricted on the number of them you may purchase at a time. (it doesn't usually stop you from making a second purchase with more of them, though, as long as they have that many in stock).