eBay

Am new to selling on Ebay and have sold an item (free postage) under a different ID - do you have to send an invoice to the buyer? I was reading on past posts that some sellers don't but just wanted to check as couldn't really find any useful info on...

Just wondering how long it took sellers to sell their first few items when starting out? (I guess its like asking how long is a piece of string!) Am selling mens / womens rings (titanium, ceramic, stainless steel, tungsten) and have been getting cons...