Got a Sennheiser PC360 for 30 bucks back in 2018, had a slight problem with the volume not being able to go 100% but otherwise it was in pretty damn good condition with the mic and the sound itself crystal clear + it didn't stink.
Pretty hard to find any decent headphones/headsets in Indonesia that is associated with a big brand to be priced so damn cheap, and I remember the GAME ONE was going for a lot back then so it was a no brainer for me.
That was certainly something, I forgot my IEMs(also Truthear hola funnily enough) were in my pockets and I put my shirt into the washing machine a month ago, was momentarily broken but the easy fix was just to use a hair dryer and it worked again like normal to this day.
It's a bit pricey lesson and I can sympathize, but try a hair dryer next time if there's water again lol