Any new owner has to honour your current rental agreement and cannot change the rent etc until that current lease is ended.

You CAN refuse open homes on a reasonable basis - ie once a fortnight rather than once a week, or only on Saturdays, not both Sat and Sun, you can also dictate if any access is granted around these times - ie if a potential buyer wishes to see the house again during the week or after hours.....Do NOT be scared to say NO if it is not convenient.

All home open times need to be organised in advance - they cant call you on the Thursaday and tell you there is an inspection that weekend.

You can leave the house in any state you choose, and you can be there, have the right to be there and if they tell you otherwise, revoke permission for the home open until they accept it.
Don't let the RE agents push you around - they will walk all over you if you let them.

When does your current lease end? Make sure you tell your landlord and the RE agent that you have no intention of leaving until that agreement is up, as is your right, and any new buyer must be aware of this.

Good luck!