What was the ICO price?
If I remember it correctly, it is around 0.002ETH per ENG.
It once reached 0.0028 ETH the first day of distribution, but went downward soon.
Yep, That's correct. 1 ENG = 0.60 USD/0.00204 ETH.
This is a noob question, but do I need to worry about this multi sig issue if my ENG is stored on my Trezor via MEW?
Nope, You're fine. AFAIK those using parity are the only ones that are affected. ENG isn't affected by parity bug as it has been confirmed on Telegram.
dev where i can trade ENG?i want buy little token
Binance or look at coinmarketcap.