The double-sell problem

Every yard that has grown past one salesperson has felt it: a buyer is promised a block, arrives to collect it, and it's already gone — sold that morning by someone else, from the same register, with no way for either seller to have known.

The double-sell is a small operational glitch with an outsized cost, because it lands on the two things a yard runs on: cash and relationships.

Why it happens

It isn't carelessness. It's structure. A paper register — or a shared spreadsheet — records what you have. It has no concept of what's been promised but not yet collected. So between the promise and the pickup, a block sits in a blind spot: available on the page, spoken for in reality, and nothing bridges the two.

Add a second salesperson, a busy Saturday, and a hot block that several buyers want, and the collision isn't bad luck. It's inevitable.

What it actually costs

• The lost sale, twice over. One buyer leaves empty-handed; sometimes both, if the substitute doesn't satisfy either.
• The relationship. A buyer who was promised something and didn't get it remembers. In a trade where buyers and sellers know each other for decades, that memory is expensive.
• The scramble. Staff time spent apologising, finding a substitute, and smoothing it over — none of which was necessary.

The fix isn't "be more careful"

You can't solve a structural gap with individual carefulness, because the gap is between people, not inside any one of them. The fix is to make the register itself understand reservation.

The principle: when a block is committed to an order, it should be reserved — removed from what everyone else can sell — the instant that commitment is made. And the reservation has to be atomic: if two salespeople reach for the same block at the same moment, exactly one succeeds, and the other is told, cleanly and immediately, that it's gone. Never both. Never half.

That "never both" is the whole game. It's the difference between a system that reduces double-sells and one where they are simply impossible.

Quotes are different — on purpose

There's a subtlety worth getting right: a quote is not a commitment, and shouldn't lock stock. You want to be able to pitch the same attractive block to five different buyers — the one who confirms first wins it. If quoting reserved stock, you'd freeze your best inventory behind tyre-kickers.

So the healthy rule is: quotes hold no stock; orders reserve atomically. Pitch freely, commit safely. The block is only locked at the moment someone actually converts a quote into a real, committed order — and from that instant, no one else can promise it.

Get that one rule right and a whole category of embarrassment, lost sales, and damaged trust simply stops happening.