I don't think your chain would count as budget jewellery.

Anyway, at least you are now aware of the rules regarding selling jewellery on Ebay,

I have to say my experience of buying jewellery is different to yours.

Most of my jewellery, either bought from High Street jewellers or secondhand, does have a complete UK hallmark.

Even gold earrings usually have a full hallmark on the post,

i would be reluctant to buy anything that didn't have a full hallmark.  I like to know who made my jewellery, where it was assyed and how old it is.