The price difference is because if you want a gilt for breeding she will be better quality than a fattening gilt. She will also come registered which means she has papers without which you cannot breed and sell on PEDIGREE pigs. You would only be able to sell pigs for fat or without papers.
You will probably get cheaper i expect but I will only sell good quality pigs if they are for breeding.
Again I don’t think the gentleman in question has a computer sorry.