Where aftermarket prices come from when there are no public comparables

Ask why a Vietnamese domain costs what it costs and you will not get an answer built on recorded comparable sales, because the public record is thin. Reported transactions are sparse, private sales dominate, and the venues that publish data in English see very little of this inventory.

That does not mean prices are arbitrary. It means they are assembled from four substitutes, each useful and each with a failure mode worth knowing.

Substitute 1: replacement cost

What would the buyer have to pay to reach the same position another way? For a business whose name is already in market, that is the cost of rebranding: signage, printed materials, app store listings, search presence rebuilt, and the customers who do not follow. This number is usually far larger than the domain price and is the strongest argument a seller has.

Failure mode: it only applies to a buyer who has already committed to that brand. Quote replacement cost to a startup still choosing a name and you have simply priced yourself out, because their replacement cost is zero.

Substitute 2: adjacent-market comparables

Take the English equivalent of the term, find what names of that type sell for, and apply a discount for the smaller buyer pool. A category term in a sector with real commercial activity ought to trade at some consistent fraction of its English counterpart.

Failure mode: the discount is the whole answer and nobody agrees on it. Sector matters enormously — a term in a sector where Vietnamese businesses spend heavily online sits far closer to its English comparable than one in a sector that is still offline. Applying a flat ratio across a portfolio produces confident nonsense.

Substitute 3: search demand

How many people search the term monthly, and what would buying that traffic cost through advertising? This grounds the price in something measurable and is the substitute most likely to convince an analytical buyer.

Failure mode: two of them. Keyword tools handle Vietnamese unevenly, particularly for the unaccented form, so volumes are noisier than they look. And a domain does not deliver search traffic on its own — it makes acquiring it cheaper. Presenting search volume as if it were guaranteed traffic is the fastest way to lose a serious buyer's confidence.

Substitute 4: revenue anchoring

What would a business built on this name earn, and what multiple would that business trade at? Useful for names in high-value transactional sectors, where a single closed deal covers the domain many times over.

Failure mode: it values the business, not the name. The domain contributes a slice of that outcome, not the whole of it, and the slice is a judgement call rather than a calculation. Treat this as a sanity check on the upper bound, never as the price itself.

Putting them together

The method that survives contact with actual buyers is to run all four, discard the highest and the lowest, and look at what the middle two agree on. When they agree, you have a defensible number. When they disagree by an order of magnitude, that disagreement is itself the finding: something about the name is unusual, and it is worth understanding what before quoting anything.

Two habits make this work. Write the reasoning down at the time, because a price you cannot explain six months later will be discounted the moment it is questioned. And keep a consistent price ladder across a portfolio, so that two comparable names are never quoted at wildly different figures to two different buyers — nothing destroys credibility faster.

The one thing that is not a price signal

What the current owner paid. Acquisition cost is a fact about history, not about value, and buyers sense immediately when it is doing the work. A name bought cheaply in a bulk lot is not therefore cheap, and a name someone overpaid for is not therefore expensive. Both statements are obvious, and both are ignored daily.