We paid about $2500 for vision therapy (included 24 weekly visits and occasional progress checks with the optometrist). My sense was that was the going rate around here. If there is more than one provider near you, it would be worth calling around. (
www.covd.org )
OT was the big one, I think around $4000 per child for 20 sessions but I can't remember exactly what it was - about a year and a half ago. I think we got a small discount on the sibling.
No insurance coverage here either, but I guess we are lucky in that we happen to have some great services nearby. (by the way, the Star Center does have some sort of program for out of town clients that is even shorter/more intensive than the one we did)