The amount you can sell your pork for really depends on what area you are in and what competition you have. It is worth looking around to see what others are selling theirs for.....Also make sure you would have a market for your meat, 2 osb pigs at 8 - 9 months (presuming you buy them at weaners) would produce a lot of meat.
There was a post in the pig section to look at, where WP put down all his costs for keeping his pigs and what he sold the meat for.
Let us know how you get on.