I came across an old locked thread about wish.com just now, and as I have used wish and bangood extensively, I thought I'd add my two cents worth.

I came cross wish while looking a DTI (Dial Test Indicator), and nearly fell off my chair when finding one for NZ$15 on wish.  I spent the next half hour trying to find if it was a scam, and while I found some chatter from people who had issues with returns, it otherwise appeared to be OK.  So for the sake of $15 I took a punt, and two weeks later (delivery can take a while — a month is not unusual) this perfectly serviceable small dti arrived.  It was smooth and apparently accurate, but I would be using it as a comparative so linear accuracy was not imperative.  Since then I have spent a good few hundred dollars with wish and bangood, and have mostly been pleased with what I received.

Just recently I have had a few things that are either _very_ slow or have been lost en route.  The greatest chance of this happening is with the 'free — just pay shipping' items.  That has included a diamond grinding wheel dresser, and a set of those hex to 1/4, 3/8 and 1/2 drives for sockets in your cordless drill.  I paid $5 for a wee block plane that turned out to be more wee than I'd realised (about 40mm x 20mm x 12mm) and is more or less unusable.

Otherwise I have bought two wood working marking gauges both of which are sensationally well made.  1-2-3 blocks that are within half a thou (old money).  Two more DTIs; HSS tool steel blanks, ER32 collet set for just $70, an MT3 boring head for a milling machine, counter bore set, centre drills (3 different sizes), digital height gauge and digital angle finder.  The last two items are incredibly useful for things like table saw and router bit blade heights.  The angle finder lets you get jointer fence to within a tenth of a degree, and I use it for setting jobs in the milling vice to cut angles.

I have bought two edge finders neither of which I ever use finding that I prefer the ball bearing edge finder I made 50 years ago.  One of the bought items has a battery and is used without rotating it beeping and flashing when it makes contact with a metallic work piece.  That is a dead loss being at least .01mm out, but I might be able to take it to bits and re-centre the ball, although that still wouldn't guarantee acceptable concentricity.  Another lemon was a mag block for the DTIs.  The arm is OK and is identical to the photography accessory magic arms you see on YT, but the mag block is tiny, and the magnet is not strong enough.

I have bought a lot of cheap as chips hardware like a box of assorted metric grub screws for about $5.  A box of stainless allen bolts from 3mm to 6mm for about $10. Five M6 knurled knobs.  I am waiting right now for milling machine handle, and if it is OK I'll get another one and build a Moxen vise, or extend the table on my drill stand.  And it all comes for stupid low prices.

Of the main three Chinesium sites wish is usually the cheapest, but it also has the least detailed descriptions and information.  You need to read the descriptions VERY carefully, and not miss any drop downs.  Definitely don't go from just the pictures, because they will show items not included but not make that clear. Bangood is better with more detailed descriptions. Aliexpress is better still with excellent descriptions, but the items a more expensive.  I wouldn't risk wish or bangood with expensive electrical items.   

The bottom line is that I have a tool kit I would not otherwise have been able to afford, but having said that, I have found things cheaper than wish in Supercheap, and there is obviously no postage, and no four week waiting time.