Devenity,
Depends. I have a formula to figure out my prices. First, I figure the amount of trash and the size dumpster I may need. Then the number of hours to do the work, then a factor for my overhead (insurance, gas, vehicle expense, advertising, etc) then a profit margin. I add them all up to get my bid.
With dumpsters running $300-600, the cheapest bid I have done is $1000 and the highest $4500. Sometimes we include the janitorial service in the bid, sometimes there is no point in doing any janitorial work.
I may be high sometimes but I also can't work for free. It's the same way I figure a bid to build a home. There has to be profit built in or there is no point.
I have seen a safeguard sticker at every bid I have done.