Adorama offers the MEElectronics M2 Sound-Isolating In-Ear Headphones, model no. AI-M2-BK-MEE, for $4.99 with free shipping. That's $1 under our April mention and the least expensive MEElectronics earbuds we've ever seen. (It's a current price low for this model by $5.) They feature 9mm drivers, a 20Hz to 20kHz frequency response, three sets of noise-isolating eartips, and more.
Adorama offers the FiiO E17 USB DAC Headphone Amplifier for $89.99 with free shipping. That's $2 under our June mention and the lowest total price we've seen. (It's also a current in-stock price low by $49.) It features an OLED display, mini USB connectivity, 3.5mm and S/PDIF inputs, gain controls, balance controls, and tone controls.
Also available is the Fiio E12 Mont Blanc Headphone Amplifier for $89.99 with free shipping. That's the lowest total price we could find by $30. It features a 3.5mm stereo jack, micro USB connectivity, and charging indicator.