I have a remaining debt of $800 on a judgement against me for around $3600 but the creditor is now threating a sheriff’s sale?
From what you have written with respect to the $800 left on the debt that you owe, the judgment creditor cannot get a sheriff's sale with respect to any assets that you have. You do not own a home and your personal belongings most likely are exempt from levy. It sounds to me that the judgment creditor is trying to bully you.