In New Hampshire, if you chose a traditional real estate agency, commissions are generally 4 to 7%, with the average being 5 or 6%. The commission that you pay to your agency is shared with the cooperating agency, or the agency who brings in the Buyer. You and your listing agent will decide together what percentage the Buyer's Agent will get. A higher commission for the Buyer's Agency *may* result in more Buyer's Agents showing your property instead of a competing property with a lower percentage paid out. As a Seller, it is your choice as to whether or not you will allow for Dual Agency (or allowing your agency to represent the buyer as well as your best interest).
For the Seller who wants to take a hand's on approach, there is a "list only" option. This arrangement would direct Buyers directly to your phone or email, and you would set and be present (or not) for appointments. You would plan your own open houses, etc. You would also determine what percentage you will be paying out to the Buyer's Agency.
It's not a one-size fits all real estate world, and there are more options than ever for Buyers and Sellers. Will you want accompanied showings? Professional quality photography? Virtual Tours? An Internet-savy agent who will get your home online with expanded realtor.com listings? Traditional newspaper advertising? A basic listing with one or two exterior pictures?
Keep in mind that by waiting until summer to list your home, you are missing out on New England's typical Spring market, and the current tax incentives for 1st time Buyers and move-up Buyers. See Federal Housing Tax Credit: Tax Credits at a Glance
(http://www.federalhousingtaxcredit.com/glance.php - broken link) for more details