LittleDot MK IV is a tube headphone amplifier that can also work as a preamplifier. It is priced at 499$.
Shozy Form1.1 is a mid-end model with one dynamic and one balanced armature driver. It is priced at 75USD. I did order it randomly, and I definitely do not regret it.
iBasso DX160 is a mid-end DAP with built-in MQA decoding, Android 8.1, 4,4mm balanced output and it is priced at 399$.