I have seen hero member accounts going for 0.5BTC, so its risky to give a 1.6BTC loan for hero account collateral
Don't under sell Hero accounts that take 18+months to build, the accounts you have likely seen sold without out a signed message had crappy posts or drama surrounding them, so which was it lol
OP your account is worth around 0.7 - 0.8 at your low status without checking post quality, so you are looking at around a 0.6btc loan if your lucky, can you provide a signed message from a long time ago?