The market has a lot of competition but I thought of two niches - 'politically incorrect' & auction house sale items which aren't already available on other sites.
There is plenty of public domain material which I can use, and I can add more categories as I go along.
I see some nice travel posters on one auction site which have sold but the images are still there, and not well protected but are high quality. The images are in the public domain, but may now never see the light of day due to them being privately held.
There may be limitations on what I can obtain this way, but it might be worth the effort if I have what no other seller has.
I was actually looking for images to use on other products but got side tracked by posters I was seeing and now want to sell them - if it's worthwhile.
I can use Zazzle or whatever, I suppose, for printing and selling but that won't be very profitable. I'd rather get some made and sell on eBay or Amazon or do a Shopify shop maybe, if I can build a large enough range of products. I do realise that quantity will be important, wherever and whatever I sell.
I would appreciate any advice or opinion, please. I haven't done any research as to what is in demand, other than what I have seen for sale around the web, but I do seem to enjoy much of what others seem to, and feel confident in picking saleable products. And I know how to list products effectively, I think. But is it going to be worth the bother if I concentrate on just one or two niches for now, or will I have to spend a lot of time compiling a huge selection of posters for sale in multiple niches?
Also, where can I obtain short runs of posters at reasonable rates, does anyone know?