First, only about 40% of listings actually sell, and the lower your feedback, the harder it is to make those few sales.
Do a little buying to amp up your feedback.
Your titles are weak. Add size, brand and colour to your titles. You have 80 keystrokes FREE. \use them all.
Some people search NWOT (New WithOut Tags) and NWT (New With Tags).
Tags are manufacturer's tags, not sales tags.
The more items you have listed , the more likely you are to find buyers. And the more likely buyers are to find you.
Don't mention feedback. It is not a selling point. Never never mention negative feedback . Just don't.