You are selling in a very oversubscribed category so unless you can offer something other buyers can't you are going to struggle.

Do you just buy the beads to sell or do you make things with them? If you do make things why not sell them. The more items you list the more exposure you will get.

The postage time is not really a great advantage, depending where you are there are always going to be buyers somewhere who will probably have to wait over to weeks for your things to arrive and quite often items from HK arrive fairly quickly.

I used to do a good trade in selling tee shirts which I embellished with beads and/or sequins. I advertised them as one of a kind items and never did two exactly the same. That was back in the days before I had a store when I just auctioned about 20  to 30 a week. Sadly I no longer have the time or the energy left to do that anymore.