Damage done to my condo while it was for sale. Who pays?

It is possible but normally a realtor doesn't really take control of a property more than showing it to potential buyers. We don't know what your arrangement was but it doesn't seem likely (?) your realtor would be liable in this regard unless you can show a connection between the realtor and person(s) living in the house.

You can't prove the realtor had anything to do with it, so it's on you. Might be a good idea to install a security camera.

Sadly it is your problem and you are going to have to pay for the damages. I went through a similar thing, when I listed mine with a trusted realtor a lock box was put up with a key which allowed any relator to show it.

When I got the electric bill at the end of the cycle if was well over $300 for an empty house. Turned out one who "inspected" the house had randomly flipped switches and left on outside flood lights plus downed the A/C down to 65 degrees and left it.

I also found the hard wood floors scratched up and several things damaged.

It sounds like the realtor failed to lock the door after a showing. That's the realtor's fault. This does happen. My husband and I saw a house for sale about a year ago and decided to have a closer look, before making an appointment to see it, since it looked sort of vacant. The door was unlocked. We walked in, checked out the place and left. We did not touch anything. We later notified the owner that the door was left unlocked. The realtor is at fault for failing to secure the place. She was irresponsible. It was her JOB to lock the door before she left. Consult a lawyer. You ARE entitled to compensation.

You do. Your realtor is not responsible for any of this -- unless you have irrefutable proof that your realtor let someone in, used it, or was negligent in keeping the property lock. You, as the owner and landlord, have total responsibility for checking your property. Sorry. As others have noted, you can certainly file a police report and or contact your insurance company. I'd also suggest you take a deep breath and reconsider why you need to replace bed linens that have be on the floor. Can't you just wash them and put them back on the bed?

You might also want to invest in a RING or similar video doorbell and or interior camera if you plan on putting the house on the market again. That way you can be notified remotely anytime someone enter the property and keep and eye on what they do.

i would have the police investigate it

Sorry, the realtor isn't responsible. Make a police report if you didn't already.

You have no way tp show he is responsible. You should have been checking on your own property.

Is it unreasonable to submit the expenses to my realtor?"

Yes. You own the property. Your realtor is not a 24/7 security service.

"Or is it on me to check a property all the time to make sure stuff like this isn't happening."

You can check it as often as you like or you can pay a property manager to do it for you. You paid your realtor to sell the property, not provide security.

Your realtor doesn't get paid without a sale so they have every interest in making sure the home is in saleable condition.

You own the house. You only contracted with the Realtor to sell it. Unless you have proof they were involved in this, I don't see how you could expect them to be held liable.