Yes motors are like gold. Since they are so expensive new, there is a very limited supply of used motors with low hours on them. When you do find one, they don't sell at a huge discounts to new. People buy and run 'em until dead.

Unlike lawnmowers, outboard engines are generally improved upon each year......and this is where the higher prices come in.

If you are looking for advice, I would recommend buying in Canada and keeping your engine for a long long time. There have been several posts on this topic in the past year.