You find two photographs online. They look similar on screen. One is eighty dollars and one is twelve hundred, and nothing on either page explains the difference in a way that makes sense.
This is the most common question I get, and it deserves a straight answer rather than a sales pitch. Here's what separates the categories, what actually justifies a price, and what doesn't.
The four things you're buying
Any print's price comes down to four things: how it's made, how many exist, how it's finished, and who made it. Everything else is marketing.
1. How it's printed
A poster is printed with dye-based ink on paper that isn't designed to last. It looks good for a couple of years, then the color shifts — usually the reds go first — and by year five it's noticeably faded, especially anywhere near a window.
A fine art print uses pigment inks on archival cotton or alpha-cellulose paper. Pigment doesn't fade the way dye does. Properly made and reasonably displayed, it holds its color for decades rather than years. This is the single biggest cost difference in the actual manufacturing, and it's the one you can't see on a screen.
The paper matters as much as the ink. Archival paper is acid-free, so it doesn't yellow or become brittle. Cheap paper does both, and once it starts there's nothing to be done.
How to tell: a real fine art seller will name the process — archival pigment, giclée, or a specific paper. A poster seller will say "high quality" and nothing more specific.

2. How many exist
This is where most of the price difference sits, and it's the part people find hardest to accept.
An open edition means unlimited copies. However many people want one, that's how many get made. There's nothing wrong with this — it's why posters are cheap — but it means the thing you own is not scarce and will never be worth more than you paid.
A limited edition means a fixed number exist, the number is stated, and when they're gone no more are made. Each is numbered. That number is a real constraint on the maker: once I've sold the last one, I can't sell it again, regardless of how much demand there is.
That's what you're paying for, and whether it's worth it depends entirely on why you're buying. If you want something beautiful on a wall, an open edition is fine and you should buy one. If you want a piece that holds value, that's a different purchase.
How to tell: a limited edition states the edition size and comes with a certificate of authenticity. If a listing says "limited" without a number, it isn't one.
3. How it's finished
Framing is where a surprising amount of cost lives, and where the corners get cut most often.
The things that matter: a real wood frame rather than moulded plastic. UV-blocking glazing, because ordinary glass lets through the light that fades the image — this is the part that protects everything else you paid for. Acid-free matboard, because non-archival mat will leach into the print and stain it from the edges inward, usually within a decade. And backing that seals the piece rather than exposing it to the wall.
A framed piece that costs barely more than the unframed one is telling you something about the frame.
How to tell: the listing specifies the glazing and the matboard. If it just says "framed," assume the cheapest option.

4. Who made it
This is the least tangible and the most honest to be blunt about. Part of what you pay for original photography is that a person went somewhere and waited for something, rather than a stock library licensing an image to a thousand sellers at once.
Whether that's worth money to you is a personal question. But it's a real difference: an open-market stock image can appear on a hundred different sites under a hundred different names. Original work can't.
What about canvas?
Canvas is its own category rather than a step up or down.
The advantages are real: no glass, so no reflections and much lighter on the wall, which matters at large sizes. It reads as a painting rather than a photograph, which suits some rooms.
The trade-off is detail. Canvas texture eats fine detail, so it suits soft, painterly images and works against sharp ones — architecture, wildlife fur and feathers, anything with fine structure. It's also harder to protect: without glazing, the surface is exposed, and canvas coatings vary enormously in quality.
If the image is atmospheric and large, canvas can be the right answer. If the image rewards close looking, it usually isn't.

The honest summary
A poster is a picture. It costs what it costs because it will not last and anyone can have one. That's a perfectly good thing to buy, and for a hallway or a kid's room it's often the right call.
A fine art print is an object. It's made to outlive you, there are a fixed number, and the framing is built to protect it rather than just hold it. That costs more because each of those decisions costs more.
The mistake isn't buying either one. The mistake is paying fine art prices for poster construction — which happens constantly, because the words are unregulated and anyone can print "museum quality" on a listing.
So ask the four questions. What paper and ink. How many exist. What's the glazing and the mat. Who made the image. Any seller doing this properly will answer all four without hesitating, and the ones who can't are telling you what you need to know.
See the limited editions · The framing specification · What size fits your wall