Before negotiating, look at a few comparable listings in the same locality and configuration to understand the reasonable range for the unit you are considering. This gives you a grounded starting point rather than an arbitrary one.
Landlords are often more open to negotiation on longer lease commitments, flexible move-in dates, or when a unit has been vacant for a while. Being upfront about your timeline and intentions can work in your favour during discussions.
Keep the conversation collaborative rather than adversarial — a landlord who feels respected during negotiation is often more accommodating during the tenancy itself.