Well it depends what type of horseperson you are.
Personally, I hate buying horses without riding, but I did one and never regretted it.
Buying from abroad is generally more expensive because you have to add an aditional 2-3k in shipping costs to the price of the horse.
But there are some INCREDIBLE horses available everyone, some places better then others. When I get enough money, Im looking at importing from Germany, just because their horseflesh is so much better then Canada's and reasonably priced...