| Date | Region | Description | Price | Seller |
|---|---|---|---|---|
| USA | The famous Orthogonal Devices ER-301 (rev.10) and Calsy... | $1,750.00 | ||
| USA | Up for sale is the Orthogonal Devices ER-301 Sound Comp... | $1,299.00 | ||
| USA | Excellent condition. Original packaging and screen prot... | $1,999.00 | ||
| USA | Single owner ER301. Original box included, but nothing... | $1,500.00 |