I recently had to empty a relatives 2300 sf house, their 1500 sf basement and 700 sf attic. It was maddening because no one wants to pay very much for used household items, furniture, accessories and what not.
I tried to sell things on craigslist with some success but even more frustration. One lady wanted me to deliver a piece of furniture to her and re arrange her room. Another person wanted me to hold something from Jan to April for their tax refund check! Someone else kept me on the phone with questions for over 20 minutes before we both realized he made a typo with the state search and was about 2500 miles away!! UGH.
In the end, my realtor attorney (closing attorney) had a list of guys who come and take everything for a price. The price was low, but I did not have to lift a finger and in one fell swoop, the house got emptied of all the stuff that I did not want. It was such a relief and so easy. Sure, I could have made more money if I sold things piece meal, but that is a royal pain in the behind, I found out. Also, consignment shops do not buy your furniture, they house it for you on their sales floor for 40 to 60% of what it sells for. Then, they typically have a contract that states they can lower the price in x number of days...after that, you either have to go back and retrieve the item(s) or they get donated to charity.
Funny thing is that everyone wants your stuff but no one wants to pay for it.
So, you have to ask yourself....do I have more time and energy to sell items singularly or in bulk? There are plenty of people who buy estates. If you have some pieces of value, let them know that you know you have something worthwhile and ask for more money. Have a reasonable figure in your mind to sell everything and then add $100 or more to that number because they will talk you down at least that much. Experience. I know.