Markup for cash out.
Simple only

The property agent manage to find a bank whose valuer able to give high value of this property (mostly small valuer firm)

So they nego with owner to markup higher so the buyer can cash out extra money above purchase price

For example:
Real price RM250k
Markup price RM370k
Loan 90% - RM333k
Extra RM83k (10% need pay agent for consultation fee)

You help me, I help u

*If buyer din pay and kena lelong and management of the bank found out the property should only value at RM250k, valuer most likely will be blacklisted and the bank officer also in trouble

No risk to agent
Want better example? Check Scott garden at bricks

60-70 units transacted at RM650k while actual value only RM300k+

All buyer apply same bank