Not a seller, but have a read here, one of the sellers are trialing tracked/non tracked postage for low value items.

https://community.ebay.com.au/t5/Selling/Tracked-Postage-on-Low-Value-Items-Experiment/td-p/2399667/...

eBay really don't read here and honestly I don't think they care about any low value items sellers especially here in Australia