1 day shipping...
Remove no returns because that is pointless in most cases a buyer can force the issue whether you want to or not ...
IF they buy it and say the silver is no silvery enough then can file item not as described and return it soooooo No returns is just a pointless turn off to customers...
The biggest thing I think for you is this ..
As time goes by all categories on ebay are now flooded compared to the years past and only have 6 listings in one of the more flooded categories on ebay ..
Example I type in Owl Jewlery and there are 52,264 listing and only 6 or .01 % of the listings are your so no matter what you do your listings a very much a needle in a hay stack ...
If I type in Jewlery there are
6,119,796 listing so now your only .00009% of the listings
Wish I could help more but in your category you just have to fine tune and hope for the best