Adorama offers the Fender CXA1 In-Ear Monitors with 3-Button Remote in Blue for $29 with free shipping. That's $20 under our April mention and the best price we've seen. (It's a current low by $56.) They're compatible with iOS and Android and feature 8.5mm titanium drivers, a 14Hz to 22kHz frequency response, and an in-flight entertainment adapter.
Thrift shopping is one of the best ways to stretch your dollars. But sometimes a great deal isn't worth it — or, even worse, is dangerous.