hope you dont mind me saying but although not everyones cup of tea, imho it is a piece of art and a very good one at that. Personally i would try putting some rechargeable LEDs in it maybe to sell it as a light ? As for selling it i would try etsy or chairish, if it was me i would also not be afraid to point out the fact its one of a kind, handmade etc and put a decent price on it. There are also a few local galleries around that will show your goods, they do charge a very high commission but i guess they do have to pay rent, rates etc so is only fair. Try instagram, message lots of interior designers with a short blurb. I you want help i have a few i have worked with also the gallery side too.
Very kind of you all. I’ve received a generous offer from a member, but I’m curious what it might look like with lights in it, possibly in the style of a James Bond type cryogenic vial storage pod... so I might mess about with it a bit more after all.