I can't comment specifically on price as each area is different. But how many sq. ft.? You stated 176 long, but how wide? Will you be breaking new ground? A 36in. rototiller? Is this a walk behind unit? I've never seen a walk behind that wide. My 3-pt. tiller is 4 or 5 feet wide, if you get where I'm going with this.... I do a good bit of tilling and the one thing I've noticed is that it is a hard sell to get a fair price. Again, pricing "anonymously" on the net is difficult, but my gut says your price may be low. If they'll pay rental plus 88, wouldn't they pay rental plus 125?