Monuments and Markers are priced according to size, color of material used, design and installation cost, plus whatever applicable cemetery charges are involved. Prices can range from under $1,000 for flat markers and simple upright monuments to $10,000 and higher for more elaborate monuments. On the high end of the spectrum, large and impressive walk-in mausoleums can cost hundreds of thousands of dollars. There is a very solid, concrete foundation used below upright monuments so there is very little problem with monuments tipping, shifting, or becoming unlevel.
Most monument builders will warranty their finished product against defects in material, workmanship, and installation. Consult with your monument builder about his warranty.