The cheap option is frequently the expensive one, and there is a number that tells you which
Cost per use is the purchase price, minus whatever you eventually recover by selling it, divided by the number of times you actually use it. A $400 coat worn 200 times over five years and sold for $100 costs $1.50 a wear. A $90 coat worn 30 times before it falls apart costs $3.
The cheaper coat cost twice as much. This is not a rhetorical trick; it is what the arithmetic says, and it generalises to most durable goods — tools, luggage, instruments, kitchen equipment, furniture, bicycles.
It is the same structure as total cost of ownership for a car, applied to things small enough that nobody bothers. Which is exactly why the mistake is so common: individually these purchases feel too minor to analyse, and collectively they are a large share of what households spend.
Three inputs: what you pay, what you get back, and how many times you use it. The third is where honesty is required, because the number people imagine and the number they achieve are rarely the same.
Resale value is the input most often assumed to be zero, and for many categories that is simply wrong. Well-made tools, instruments, bicycles and certain brands of luggage or outerwear hold value strongly, and a resale market with real prices exists for all of them. Recovering a third of the purchase price changes the arithmetic substantially.
Durability shows up as usage count rather than as a separate term. Something that survives 200 uses and something that survives 30 are not competing on price, they are competing on price per use, and only one of those numbers is written on the tag.
The honest version also prices the alternative of not owning. Renting, borrowing, or paying someone with the tool already is frequently cheaper for anything used a handful of times, and cost per use is what makes that visible.
Cost per use = (price − resale value) ÷ realistic uses
Resale is not zero for tools, instruments, bicycles and quality outerwear
Durability enters through the usage count, not as a separate adjustment
For rare uses, renting or borrowing usually wins outright
Estimate uses from what you actually did last year, not from intent
The real price of many durable goods has fallen substantially over decades. The Bureau of Labor Statistics tracks durable goods in the Consumer Price Index, and the long-run direction is unusual: unlike services, durables have often become cheaper in real terms.
Cheap is good. The side effect is that price stopped being a useful signal of durability, because the range of quality available at any given price widened enormously. A buyer using price as a proxy for how long something lasts is now using a proxy that broke.
Warranty length is a partial substitute and a regulated one — the Magnuson-Moss Warranty Act governs how written warranties on consumer products must be presented, which at least makes them comparable. But warranties cover defects, not wear, and the thing that determines cost per use is usually wear.
The most useful correction is not buying expensive things. It is being honest about the usage count. A tool you will use twice does not deserve a durability premium at any price, and the expensive version of something you never use is the worst outcome available.
Reveals when the cheap option is genuinely the expensive one
Makes buying quality a defensible calculation rather than a rationalisation
Exposes purchases that should be rentals or borrowings instead
Rewards items with real resale markets, which is where the value actually is
Scales to the small, frequent decisions that a car-sized analysis never reaches
Usage estimates are the weak input and people are optimistic about them
Resale values shift with fashion, and some categories collapse unpredictably
Easily used backwards to justify something you had already decided to buy
Says nothing about enjoyment, which is a real reason to own things
Not worth the effort below some threshold — this is a tool for durables, not groceries
Anyone replacing the same item repeatedly: If you have bought three of something in five years, the cheap version is not cheap and the arithmetic will show you by how much.
Buyers of tools and equipment: Strong resale markets and wide durability ranges make this the category where the calculation moves the answer most.
People tempted by an expensive version: It will either justify the purchase properly or tell you the usage count does not support it. Both are useful.
Anyone furnishing a home or kitting out a hobby: Many purchases at once, most of them durable, and the aggregate difference between deciding well and badly is large.
Count last year, not next year: How many times did you use the thing this replaces? That is your usage estimate. Intent is not evidence.
Look up real resale prices: Search completed sales for the specific model at three and five years old. Asking prices are aspirational; completed sales are the number.
Compute both options: Cheap and expensive, each as (price − resale) ÷ uses. If they are close, buy the cheap one; the expensive version has to win clearly to be worth the larger outlay.
Price not owning it: For anything you will use a handful of times, check rental or borrowing first. This is the option most often skipped and most often correct.