Agree with most of what's been said. Usually the low D1 guys won't be any better than your D2 or even D3 options..but *sometimes* they are. It's worth looking.
I've done it with A prestige, but A+ does really seem to make a difference in those guys talking to you.
I only call 70 miles or less, and I *think* 30 miles is the farthest I've been successful. It's usually been 10 or 20 miles, which puts D3 teams in remote areas (in terms of D1/D2 recruit generation) at a disadvantage with this particular tactic.
I've never had success with a ranked FR, but I usually send a few calls just to check. I've heard it's possible, but very very unlikely.
Right out of the gate, my experience has been about 12-15 SVs needed (up from the normal 10), but it does decrease over time like normal pulldowns. Recently I pulled a D1 on the day of signings for 8 SVs, and I suspect I could've gotten away with even fewer if I'd wanted to be careful about it.
edit: As far as overall rating, I usually try up to about 510-515 for FR. The recent guy I mentioned was 508 and I think about 510 is the highest I've signed.