Someone spends a year's salary on a bag they will carry, by their own admission, twice. Not because they need somewhere to put their keys — a £16 tote solves that problem completely. They spend it because the bag is not, functionally, a bag. It is a receipt for a kind of comfort with spending that most people never reach, made wearable.1
Most purchases are evaluated, at least partly, on function: does this do the job. A premium good breaks that evaluation deliberately — the function becomes almost irrelevant, and the entire value sits in what owning the object says, to the owner and to whoever recognizes it.2 This is not unique to Birkins; it is the general mechanism behind every status good. What makes the Birkin a clean teaching case is how far the function-to-signal ratio has drifted. A £30,000 bag that holds the same amount of stuff as a £16 tote isn't paying for ten times the carrying capacity, obviously. It's paying almost entirely for what the source calls the "ownership, the status, the story, the luxury" — everything that isn't the bag itself.3
Status signaling as a general mechanism explains why people buy visibly expensive things. The Birkin case sharpens that into something more specific: the object is chosen partly because its function-to-price ratio is so extreme that no rational, need-based explanation is available. A expensive car at least drives you places. A Birkin, used twice a year, cannot even pretend to be justified by utility. The impracticality is not a flaw the buyer tolerates — it's close to the point. An object that could plausibly be justified on function alone would leave room for doubt about the buyer's real motive. An object that obviously cannot be justified on function leaves no such room. The extravagance itself is doing communicative work.
The Birkin's specific case also sits on top of genuine structural friction — Hermès controls allocation tightly, and famously, money alone does not guarantee purchase; the bag has to be offered, often after a relationship with the boutique has been established over time.4 This compounds the signal: not only did you spend absurdly, you were also selected. The two mechanisms — extravagant function-to-price ratio and deliberate access friction — reinforce rather than substitute for each other.
You're building brand positioning for a founder whose product is genuinely useful, and they want it to read as premium. Point out gently that usefulness is working against them here — the most extreme status goods are valuable partly because their utility can't explain their price. If the product's premium positioning still leans on function ("it's just better made"), it will always be vulnerable to a cheaper, equally functional competitor. If it leans on identity and story instead, function stops being the comparison point at all.
Later, a client asks why their limited "investment piece" isn't landing the way a competitor's obviously-impractical flagship item does. You walk them through the ratio: their piece is expensive but still clearly justifiable by quality and utility, which keeps it inside a rational evaluation frame customers can price-shop against. The competitor's flagship has left that frame entirely. It isn't competing on value per dollar. It's competing on identity per dollar, a market with far less substitutability.
The clearest evidence is the secondary market: Birkin bags purchased retail routinely resell years later at a premium over the original price — behavior inconsistent with a purely functional object, which depreciates, and consistent with a status object whose value is socially rather than materially determined (see Luxury Goods as Appreciating Asset).
Unresolved: the source doesn't distinguish whether the specific extremity of the impracticality matters, or whether any sufficiently high price would do the same signaling work. Would a £30,000 bag with genuinely excellent, justifiable utility signal differently than one that's obviously impractical? The claim implies yes but never tests it.
This converges cleanly with Costly Signaling's general account of waste-as-proof-of-resources, but sharpens it: costly signaling theory doesn't require the waste to be maximal relative to function, only costly in absolute terms. The Birkin case suggests maximal function-to-cost divergence may be doing extra signaling work beyond raw cost, a refinement the general theory doesn't specify.
Behavioral-Mechanics — Costly Signaling. Costly signaling explains why spending money at all communicates something; this page identifies a specific, more extreme variant — spending money on something whose utility cannot rationally justify the spend, which removes the interpretive escape hatch ("maybe they just really needed a good bag") that a merely-expensive-but-useful purchase leaves open. The insight the pairing produces: the least useful expensive objects may be the most efficient status signals, because uselessness closes off every non-status explanation for the purchase.
Behavioral-Mechanics — Deliberate Purchase Friction. The Birkin combines both mechanisms this page treats as theoretically separable — extreme price-to-utility ratio and structural access friction — into one object. Reading them together shows the two mechanisms aren't just similar, they're complementary: friction filters who's even allowed to buy, price-to-utility ratio filters what buying it proves once you're allowed. A brand missing either layer leaves a gap a competitor can exploit — cheap-to-copy function without the friction, or friction without anything worth the wait.
Sharpest implication: an object's uselessness, taken to an extreme, functions as proof against every explanation for buying it except one — and that is precisely what makes extravagant impracticality a more efficient status signal than practical luxury.
Generative questions: