For Long Island, that's not that bad. I've done my share of projects with blown in insulation, and that's actually closer to the normal end of the spectrum. It'll go up slightly more per SF as the size of the job gets smaller, but 90-99 cents certainly isn't ridiculous for LI. If you said they were doing it for 70 cents a foot on LI, I'd tell you to grab the deal. But with normal markup and at a fair wage, the prices you're getting are what I would consider normal for that area.
Being that this is a DIY site, you could probably save a bundle if you DIY'd it. A blower around here is $75 a day. I've heard of places giving you the equipment for free if you buy the insulation from them, but they could be making it up on the material. But you can buy the insulation for $11 a bag (28 cents a SF at 6 inches deep) at the Depot. You could probably get it even cheaper at a real insulation distributor.
Being that this is a DIY site, you could probably save a bundle if you DIY'd it. A blower around here is $75 a day. I've heard of places giving you the equipment for free if you buy the insulation from them, but they could be making it up on the material. But you can buy the insulation for $11 a bag (28 cents a SF at 6 inches deep) at the Depot. You could probably get it even cheaper at a real insulation distributor.