I charge $40/K for slice overseeding, $10 more per K if I aerate before or if I have to mow the lawn short if it is too tall. Min $100 for a job. Most 1/4 ac. resis in the $275 range. I DO NOT guarantee a slice overseed job in an existing lawn. Absolutely no way too tell what you think is a good germination rate vs. what a customer thinks.
If I seed bare ground I will ensure a good stand of grass tho.
7x14 Stealth SE Enclosed with 48" side ramp
08 Toro Z400 48" deck, 21HP Kaw with EZ Vac twin bag
09 Exmark Turf Tracer HP 36"
21" Toro SR4 Super Recycler
Stihl KM90 Kombi w/ straight shaft trimmer & tiller heads
Husqvarna 125B Blower
Turfco XT5 Aerator
Turfco LS-22 Overseeder
EcoLawn 200 Applicator
I can do all things through Him who gives me strength.