If you don't specify a charge in your listing, you can't collect it. 

If there is one thing I have learned, is nobody is going to charge you a fee to learn to get rich lol.

If you see work crews reaching out, ask the person in charge of securing housing where they go looking.

Also get rid of the cat or you'll be charged an additional $xxx fee and an extra $xx/month.

So we were charged about $250 more than usual.

Of course they are going to have bad credit or they would be looking in a better area.Another thing you may want to consider to drive more applications is to not charge the application fee.

When we sold the house we did not charge the investor a commission.

You take a deposit per usual and charge them for any damage beyond wear and tear.

This is straight from the CFPB website: "Additionally, for 60 days from the date your loan servicing transfers, your new servicer cannot charge you a late fee or treat the payment as late if you sent it to your previous servicer on time or within the applicable grace period."

If the agent is doing the marketing, finding the potential buyers and possibly working with other agents to help you secure a deal then I would still charge 2.5% for my listing services and 2.5% to any buyer's agent.