We do not have that one day option here in Tucson, AZ.  Glad I do not have to deal with it.  I will not represent a listing if the seller is unwilling to allow me to put it on keysafe.

It is just lazy of the buyer's agent not to want to do it.

I never give a one day code, I think they are dumb and unsafe!!!!!

i make the person work around MY schedule if they are not willing to spend the money to have the tools they need for their choosen job

Our board / MLS is not setup for electronic lockbox systems.  Furthermore, the rules do not allow agents to provide lockbox codes to non-registrants.

The sales contract and / or the listing agreement should cover this..... In florida, the seller must provide access for the broker to show the home and the sales agreement says the seller must provide access for inspections.

If the seller cannot make the appointment then you as the sellers agent should be there to give access. You can't expect a vendor (unless they are affiliates) to pay the fee although it may help their business. Buyer reps should have a card but if not it falls back on the seller and their agent.

I personally do not use those type of key boxes bc of the hassle. It has nothing to do wth the cost and my esperience is that combo boxes are just as safe. Besides, I want to make it as easy as possible for everyone involved to do their job. 

You can also install a lockbox, hidden on the property for the Buyer's agent to access and bring in their vendors.  Around here it is the Buyer agent who would be meeting the inspectors, etc., at the property.  We are not allowed to give out one day codes either.  I had a listing that had a Sentrilock on door and once we went under contract, due to Buyer's agent not having Sentricard, I put a lockbox hidden in the garage.  I stopped in on one such inspection; only to be sure they hadn't given out the code. All was well.

I do my best to allow these vendors to gain access.  We use Supra lock boxes and these do not have any one day access codes.