</font><font color="blue" class="small">( ...This would mean at least a couple of days of rentals and I bet the rental fee on a pavement roller around here (northeast MA. ) is probably at least $150 a day. Then I also have other projects where I am going to have to do some compacting so I figured buying a roller to do all these jobs would make sense moneywise spread over all the jobs I had to do. )</font>
Day rates on rentals suck. You might want to check out the weekly, or even monthly rate. The longer you rent, the better the break.
I just checked my "Rentals Unlimited" Catalog they have a Double drum Vibratory Roller (walk behind) that rents for $110/day or $385/week.
Here's another example, I once rented a flooring nailer for a month @ $60/ month, The day rate was $30/day. I didn't use it for the whole month so I got credited back about $10.