We rented last year from a family friend. We paid $10 per point. We thought it was a good deal. WIth my father in laws military discount, Disney was offering us a 2 br at SSR, and renting the points for BLT came out to be about $300 more. We wanted to stay on the monorail so we rented. But that discount for the military was HUGE.
$10 seemed to be standard last year, but I would expect $11 to become a new standard soon as dues increases continue.
For me, our dues for BLT are $4.23, plus a $1.95 per point buy in price (buy in divided by total points included in the life of the contract at purchase) So that would be the price to rent to "break even"