eBay has this excelvan HD 720P Polarized Sports Sunglasses with Built-in Camera for 24% off the regular price, and now the sunglasses are for 20 bucks.

Features:
1. -U Disk: Support TF Card (Max. 32GB), can store movie/ music/ documents and so on
2. -TF Card: Support TF Card (Max. 32GB)
3. -HD Camera: Work as an HD Mini Camera to record gorgeous moments