The term "survey" means different things to different people. It can include, or not, the structural integrity of hull and deck, the condition of various pieces of equipment, how well the boat sails and the condition of the sails and rig, an assessment of the engine to include a compression test, a sea trial, the true "value" of the boat, and so forth. All of these factors will add to the cost of a "survey." Contact BoatUS to get a list of surveyors in your area. Discuss the surveyors qualifications with him/her and be sure you know what he/she will do or not. Some surveyors, for example, will climb the mast and check the mast head fittings, others will not. Some are experts on marine engines; others may only be able to turn the engine on to see if it runs. Finally, ask the surveyor to show you copies of surveys he/she has done on exactly the same boat you plan to buy. Also, be sure you can accompany the surveyor when your intended boat is surveyed so you can learn and ask questions. An investment in a competent surveyor will pay you back many future dividends. Good luck with this.