I bought 13,332 tokens on February 4th... they arrived in my NEM wallet on August 1st. I bought them for 582 Satoshi / ERT.
The current value at https://coinbe.net/market is 11 Satoshi and at https://btc-alpha.com/exchange/ERT_BTC/ it is 13 Satoshi.
At https://nemchange.com/Exchange/main you could sell them at XEM 0.0011 which sell at 1013 Satoshi at https://coinbe.net/market (so, 1.1143 Satoshi / ERT).
At best, a 97.8% loss if I would sell at this point.
At this point... I just let them sit in my NEM wallet... no point selling now.