Be aware that the new rules have actually already started! At least they have for me.

Sold an item today listed as second class large letter (£1.55)

Yet on my eBay confirmation email it insists that I send Tracked! This will cost me an extra  £1.20 and totally destroys any profit! 
Im beginning to wish I hadn’t started selling on eBay again….Seems more haste than it’s worth! 🤦‍♂️