Cricket memorabilia prices on certainty more than on fame, which surprises people holding something signed by somebody very famous indeed.
What moves the number
Which of the three it is — match-worn, match-issued, replica.
The match and the player, and whether the occasion is one people remember.
Proof — a photograph of the signing, a certificate with a named issuer, a documented chain.
Condition, including whether a signature has faded.
Why two of the same differ
Because one seller can say "I was at the ground, here is the photograph" and the other can say "it came with a certificate" without being able to say whose. The ladder, in full.
How to find out rather than guess
Match comparables on proof level, not on the player's name. The same signature with and without documentation are different items.
For bats and shirts, also check whether comparable sales were of match-worn items or of replicas signed later — they are frequently muddled in listings, and copying that confusion into your own price repeats it.
Where the value is not
In a confident sentence. "Guaranteed genuine" with nothing behind it does not raise the price in a knowledgeable room; it lowers trust in everything else you have said.
Questions people ask
Is a team-signed bat worth more than a single signature?
Depends entirely on who and on what can be shown. Say how many signatures and how many you can identify.
Does an unverified item sell at all?
Yes, routinely, at unverified prices. It is a normal listing in this field.
What about match programmes and tickets?
Paper, so condition is most of it — and provenance matters less, which makes them easier to price.
More: pricing cricket memorabilia, buying it.