No, vendors do not incur in any marketing costs.  When selling a property through Sur Estates, we offer different marketing packages and selling strategies depending on whether you list the property with us as an open listing or sole agency, but we take care of all marketing costs. Feel free to contact us for more information.
Pro Tip:  Avoid dealing with any real estate agency that requests upfront fees for advertising, marketing costs or advancements in commissions to pay, for instance, to be published in a magazine or for a property to be adverted in property portals.