Probably best to have a look and see what they go for on eBay or similar. It’s pretty.

Don't think it would qualify as "antique." Probably Vintage is the term you're looking for. It's quite lovely!

It's pretty! Yes, look for comps (comparable items) online. You can even try searching Google images in hopes of finding the same one.

A "vintage" item is one that's at least 20 years old, whereas the most recent definition of "antique" I read is that it should be at least 100 years old. Automobiles, of course, have different criteria.

Have you had experience selling online? I have, but most of the items I've sold aren't fragile. With something as fragile as your lamp I think I'd bite the bullet and take it to the UPS store to be packed. Or try to sell it locally.

I think that light is close to being an antique if not actually an antique. Looks like 1920 or a little earlier to me.

Looks not that old to me but perhaps it is the picture.

My guess is the lamp is 1970's. How doe the globe fasten into the metal part? What is the metal....have you put a magnet to it?
I suspect that at one time it was a swag lamp and someone shortened the chain when swag lamps went out of style. You ought to be able to get $40 for it.

It depends, is it real bronze, cast brass, cast aluminum or steel? You can tell its age if the original wiring is cloth or PVC (often times). If it is real brass/bronze you could get around $40-$50. (The canopy seems to be not the original, it looks like steel with a bronze finish).

That is builder grade 1970's and may have already had the canopy replaced the most expensive part on this is the glass which would easily by 50-75 dollars to replace. it might even be from the early '80s, now us folk might not realize that it is actually getting close to antique (since i am lol) about vintage is a better term. 50$ is top price for this and depending on your market you might only get 20$ if you have a vintage consignment shop in your area take it there better chance.

I also don't think the acorn finial on the bottom is original.

Not identical....but I am old enough to have had a couple and well remember when my friends were enthusing over the convenience of having a reading lamp without cluttering up a table with a lamp. Very good for hanging over a sectional sofa which were also popular then.
The finial most certainly is original and the type of wiring means little because it very likely has been re-wired to be a ceiling light.

It looks like a crackled glass finish - when was that in style?

P.S. just found this - saying mid-20th century:

https://adirondackgirlatheart.com/price-guides/crackle-glass-price-guide/

My two cents as a person who had rewired and used many antique fixtures, I believe this piece is probably a marriage. The canopy(ceiling piece) looks different from the socket cup. the ceiling part looks to be stamped and it has exterior through screws while the cup that holds the glass globe looks heavy and that fits with the chain link. they used to make ceiling fixtures with multiple hanging lights similar to this one. Those fixtures especially if damaged would be broken up to make up smaller hanging lights. The cup would be cast in the early ones. It is an attractive marriage and useful looking as well.

I am old enough to remember that style. I say vintage 1970s also. The darker "antique brass" was very popular as well as swag lamps. I don't know if it is original to the house but the popcorn ceiling fits right in with the age of the lamp.

I am old enough to remember that style also. I would guess vintage seventies or maybe late sixties. Swag lamps were popular and builders were replacing shiny brass hardware with "antique brass" at the time. I don't know if the lamp was original to the house but the popcorn ceiling matches the lamp's era. Coppery metals in the fifties, polished brass in the sixties and antique brass in the seventies. At least that was how it was i on the west coast.

Thanks Sammy, exactly the same light. I thought it was a rare antique. Lol

Don't you hate that Judy.