If you want really cheap earphones with cheap build quality but decent sound look for Panasonic RP-TCM125 or Panasonic RP-HJE120.
You can look for inexpensive ones from Sony too, MDR-XB50AP or MDR-XB70AP they are actually very good, other Sony cheapies, like you mentioned, is a pass.
You can look for SoundMagic E10S, they are very close to MDR-EX650AP I mentioned before, but not as good.
5 or even 6 years ago I've had Creative EP-630, they were pretty good, actually excellent for its price, by the way, still got it and they are good as new!
But still I would look for MDR-EX650AP, online or from other stores, because they are closest to a audiophile ones.