from past quotes I would say I would never use ooida for insurance.most every quote I got from other providers was at least 1 or 2k cheaper than ooida.
nothing against them I am just saying.
As for plates, I've had the seller send the title beforehand so I could get Ohio temp tags.
I've sold a few vehicles to people from Michigan (where apparently it's standard practice to simply drive without plates when buying a vehicle). I've always insisted that unless they wanted to transfer the title first, that they needed to get Ohio temp tags, since it would still be titled to me when they got stopped for no tags in Ohio.