Seriously, as trustworthy as you are on this forum, accounts can be bought and sold and therefore your reputation doesn't really count... And 680 BTC is pretty absurd, I doubt anyone can fulfill that amount even if you choose to split it up into smaller shares.
I suggest you take a loan out in real life from a bank. However you seem to not wanting to offer your house as collateral...
520 BTC, due to exchange rate.
I would absolutely be working with any lender(s) outside the forum, I don't think it makes much difference how much you trust the account.
I can't get a loan from the local bank, that's the problem. I just moved to Canada and my Permanent Residence is pending. I don't have a SIN yet, thus no credit history either. I will definitely try local avenues again once the product is further along. There are angels in the area that I've been in contact with, they're just very wary right now because they've been burned quite a bit lately I guess.
Cheers.