But OP reported that LBC won't let him open a trade.
There are 2 way to sell BTC on LBC, 1 is you yourself make an advertisement that you want to sell BTC and 2 is you search for buyers (who have their advertisement open) and they're looking to buy BTC.
Which method are you using OP? I think the 2nd method won't have any minimum and you can sell if the buyer is willing to buy a small amount.
I haven't traded there in a while so I don't know if they have modified the rules for the second method also.
I tried the second method of searching for users who were buying BTC but they are offering $20 less than the market price for 1 BTC and when I tried opening my own trade and advertising it, they said you need to have minimum 0.4 BTC in your account to post a new trade.
Is there any other exchange website which allows users to list their BTC without any limitation?
It depends on what country are you from. I think the best way for you would be to just try and see if you can find a buyer in the forum itself, the Currency Exchange section. You can open a thread with how much you're looking to sell and what payment options you accept and most probably someone will buy it for better price than LBC. Do use escrow to be safe though.