Several conditions affect the cost of renting a roll dumpster. Basically, the price of a roll off dumpster and a regular dumpster are not really far from each other. A roll off dumpster in Rehoboth can be rented starting from $300 up to $500 depending on the size. A roll off dumpster comes in three regular sizes of 10 yard, 20 yard, and 30 yard. While these are considered to be the most common sizes, other sizes are also available like 12 yard, 15 yard, 25 yard, and 40 yard. Size of the dumpster is one of the basis in computing so it is advisable to know what size fits your need.