In Sweden you ofcourse try to charge as much as you can but more than often the end provision is around 1-3% in the bigger cities and 5-10% in cheaper areas “or a fixed sum of about 3k euros”. Competition has brought it down to this level. You also have no other fees since we don’t use notaries or lawyers “The real estate agent is a guarded title and most banks don’t deal with properties not going through one”. They sort of do the work of the lawyers and the notary. You have no stamp taxes on apartments which makes it quite viable to own for shorter periods of times. Transaction costs in most countries are way higher than this.
In euros the costs would be something like this
Apartments = 4k euros
Houses = 5-6k euros
Costs are only for the seller.