Professional DJ services range from roughly $100 to $300 per hour, depending on the location and amount of time requested and type of equipment requested. In general, the more time you book, the cheaper the price. Most expect a 50% deposit upon reservation.
Many couples on a tight budget opt to rent a sound system and have a friend act as both DJ and MC. Equipment rental varies by type and location, but average roughly $75 - $270 for a dual or 4-tray CD player, audio mixer and two speakers. Corded microphones run about $15 - $20 each; wireless or "lapel" microphones are about $40 each. IF THE DJ IS TOO CHEAP THERE IS PROBABLY A GOOD REASON, REMEMBER U GET WHAT U PAY FOR.