How Much Will A Real Estate Broker Charge Me To List And Then Lease My Commercial Property?

You need to give more info about your property. What type – retail, office, industrial?? How many square feet? What town, state?
I focus on retail – and as an example, on a 3000 SF retail space, the commission could be 5.5 – 6% of the total lease.
$30/SF (base rent) on a 3000 SF space on a 10 yr term = $54,000 @ 6%
$22/SF on a 1500 SF on a 5 yr term = $9,075 @ 5.5%
On larger SF deals (eg, big box), the broker is often paid x$/SF.