Peddler
1000+ Head-Fier
They’re not on sale, but for that budget, I would recommend the iBasso IT00 or the FiiO FD1.
The IT00 has more sub bass/bass overall and it is more detailed. The FD1 sounds more natural to me, and is smoother, detail is good, but not quite as good as on the IT00. The FD1 bass is more than adequate, and is punchy, but is not a borderline bass head IEM like the IT00.
Oh, the T2 Plus is also another great IEM. See if you can get it for around $50.
I too have both the iBasso IT00 and the Fiio FD1's and completely agree with your evaluation. Whilst both headphones sound quite different to each other, they both have qualities which make them worth having. I'm so impressed with both of them and it's nice to see inexpensive IEM's offering a glimpse into high-end. Using both headphones primarily with the excellent Sony Walkman NW-A55.