I have an Old Town 17'9" canoe that I got for $100. I never use it because the pond is too small. I really need to cover it to beat the UV rays. It is too large to fit in the back of my pickup. I either have to put in on a trailer or tie it on top. Not worth the hassle. Ought to sell it. Its in great shape and worth more than I paid for it.
I also have a 10 ft. aluminum jon boat that is great for snakes to hide under.
In my case, they were just impulse purchases.