Sophia 
Been buying stuff in HuaQiangBei for people for an upcoming video. This 1 meter long Thunderbolt 4 cable I found in Shenzhen is 120rmb or $16.44usd. It’s got some Chinese controller but is “Intel certified”. Closest direct comp on Amazon is $40.
Longer cables I got for @paul also test well. 2 meter and 3 meter at 186 and 254rmb respectively ($25.5/$34.8 USD)
Jason Beaudoin@via Is the cable tester for sale? That looks really cool!
@rjackal it’s a sick tool! Whenever I pull it out in the stalls the sellers start sweating 🤣 but you need to know its quirks and how to use it https://a.co/d/915rWek
feliks✨