which outboard should I buy?

I replaced the two spark plugs in my outboard last week and it cost me seventeen dollars and change and they had to be ordered from who knows where. Chub just replaced the three plugs in his outboard and after finding that the auto parts store had them in stock, he paid just over six bucks for all three. My plugs were eight and change a piece while Chub's were under two bucks a piece. This is just one small difference between two different outboards but some differences are huge, especially when you try to decide betweeen two and four stroke models. When you consider the price of outboards these days it might be worth your while to do your homework first.