Dude, I will leave to Jason and other experts discussion of possible provenance.
I’m going to talk to you here about your marketing, not about your stuff, which I think is wonderful, old, real, authentic and most appealing to those who are passionate about the history of Native American jewelry. These are studious people who’ve read up on stuff, looked at a lot of it, and care about originality and patina. I think they’d find a hallmark useful but these people are routinely buying work completed in a pre-hallmark era.
The average 20-year-old who wants something to wear to music festivals isn’t your customer for these particular pieces.
You need to appeal to your customer.
(I think I overlap with your customer a little: I love your petrified wood cuff with the turquoise satellites, I think the object to the left of it isn’t Native American – looks like something out of Asia, though I don’t know where – and then I like the cuff in the center as I’ll be interested to hear what Jason says about the big turquoise.)
- What category are you listing under? I tend to browse through at least four categories on eBay when I’m looking for jewelry. I expect to see old stuff like yours, not under jewelry, but under:
- Collectibles/Cultures & Ethnicities/Native American - U.S./1935-Now/Jewelry
I also see stuff like yours under
- Jewelry & Watches/Vintage & Antique Jewelry/Vintage Ethnic, Regional and Tribal Jewelry/Vintage & Antique Native American Jewelry
Take more photos, particularly close-ups, and take them in natural lighting. Your pictures look dark and have highlights on them from a flash. It’s worth taking the time to show off these pieces at the prices you are asking. With your string of stones, I think that is a case of not enough information and people being rightfully wary of turquoise authenticity and quality, and they can’t tell from the pictures you are giving them.
Use your keywords for search. I am a keyword user. I will try stuff like “coral pawn” “vintage coral” and I will run certain artist surnames, among other things. You better be using “Vintage Pawn” in your listing title somewhere, because these certainly evoke those words for me.
I wish I’d had the cash for your Hooee piece, but I tend to chase undervalued pieces that delight my eye which are in a lower price range. When I have a tax refund or a windfall, I get an “investment piece” from a really good dealer. Otherwise I have a strict limit of what to spend on an individual piece.