the first time we did it, we paid 180 (60 quid per sow but the boars owner delivered and picked him up and he was over an hour away) and he serviced 3 of our sows, that was for a pedigree registered boar, now with hindsight that was far too much and one sow didn't take so we were hugely out of pocket, 2nd time lesson learned, we got a registered one for 20£ per service and only did the 2 sows (3rd was in freezer) they were smaller litters, a 3 and a 7 but very good pigs.
you can't get ai yet for oxfords otherwise (unless some one knows different?)i'd use it, but they do enjoy a boar, in time we'll get our own, problem is the hassle of either getting rid of offspring or regularly changing the boar...hmmm
it'll wait till next year!