I think its close to half the ICO price.
I'd rather not talk in straight numbers so I can tell you how much of my total cryptoportfolio I invested: 0,5%

The way I see it, selling now would mean that you will lose about 30% of your initial "investment". I'm not sure if it is the right thing to do, since WAVES price is now lower than ever. It will take a bit more time for the WAVES team to disappear (if it is a scam), so it's possible the price to have some rebounds.