Struts cost about $50 -100+ a strut. SO I would guess that a set of 4 good struts would cost about $400. Installation will take about 3-4 hours. Most shop charge about $80 an hour. So I would guess about $320 in labor.
in a shop it will cost around $350. 00 - $500. 00 depeding on strut damage. on your own. $150. 00 to $200. 00 because they usually have to replace more than one strut due to alignment and weight ballence issues