Stumble, at those prices I'll have to start visiting third world countries looking for old two-strokes, shipping them to the Khyber Pass for rebuilds (hey, good machinists are hard to find) and then reimporting them to the US.
Of course, you realize that a thousand dollars doesn't buy much titanium, or even one hour on a really light high-compression racing engine. :-)
There is real profit to be had in very small lightweight engines. You can import used ones, just not new ones for sale, so yes there is profit in it. Find one of the old seagull 1hp 12lbs engines and you could start a bidding war on sailinganarchy over it. If they work even better, but just having them is the key. Or take a few to some small boat regattas, and you could easily get 800-1000 each, the lighter the more valuable.
The problem is anything 5hp or bigger is going to be the same weight as a new 4stroke, so it's not worth the bother. But the small smokey, won't crank, things people used to throw away are now worth a mint. Just call the local engine shop and ask them if they have any, any where there is a sailing scene there is a waiting list 20 boats long looking for them.
The engine I bought was 18lbs. I have no idea how much fuel it carries because I have never put gass into it. The racing rules require me to have an engine onboard, and demonstrate it works when required, they do not require me to carry any fuel onboard (we have 1 cup of gas in the engine for rules requirements that it starts). This is a problem faced by thousands of racers in the US where new two strokes can't be sold.
The EPA rules are driving people to using weed eaters with props on them, 45lb trolling motors, and all sorts of other weird stuff. It isn't just the weight on the boat, it is the problem of taking it off the boat and storing below before every race that is the problem. Pulling motors off the back is a good way to drop them overboard....