I think the days of random LLLLs having value are behind us. Save yourself some time and just go ahead and delete these from your account. I wouldn't even wait for them to expire.
I wouldn't renew them myself, but you can put these up for sale in the NP auction section and they will sell for sure. Start the opening bid as $1 for each. It's better than nothing.
I would not renew them. Instead, sell them here or on ebay with start price of $0.99 and no reserve. I doubt you'll get more than $10 each but they'll go.