It all started with what I thought was a financial misstep by Mr. 444.
Without revealing specifics, the boys here have been playing a certain computer game, and a widely-sold (in this country) consumer product began a promotion whereby a code found within each item can be used to enhance features of the game(s) run by a certain game company.
So all you need to know is the familiar scenario of boys needling parents to please buy the product (cost: $1 to $1.60, depending on store and whether it's on sale.) Mr. 444 obliged, bringing home the product - but, not completely understanding the promotion, Mr. 444 generously brought home six. He thought it was something like each code would unlock one component of the desired feature.
It turns out we only needed one. Any more would be redundant. So we were stuck with five units of the un-needed product. I gave the husband some dirty looks for buying six of something we don't consume anyway (or certainly don't need six of). But he meant well. And it was "only" $12 or so that he spent. (He went to a store which charges full list price because he knew that store was sure to have the item.) But even $12 seems like a lot when we're trying to make each dollar go to debt repayment.
A few nights later (last night) he had the idea to see if anyone would like to buy one of these codes online. And they sold lickety-split. For his $12 outlay, he has cleared (after listing fees, Paypal cut, and all else that goes into a conservative estimate) $7 per item. So what do you think we did? We went out and bought two dozen more last night.

Oooh, the risk. Really - we made a little money (about $35, which is about 300% profit), then went out and spent $24 (our favorite local supermarket had them on sale, with use of our bonus card, for a dollar each, and he cleaned out their stock), thus re-investing the majority of our profit into new inventory for this "business." (The first round cost about $12 - they were not bought on sale - and we cleared, after expenses, about $35, and then we reinvested $24, more efficiently this time, at lower cost per unit, for 24 units, not accounting for a few cents for tax - is it OK if I don't detail for the 6% sales tax in our state or do I have to be more exact? ;o)
So far today we've sold two. People in certain other parts of the world can't buy this particular product, so they're willing to pay us about $9 to get what would cost a buck or two over here.
*** Mr 444 here with an update. We've sold 8 total of the mystery item so far. Our friends in the Netherlands love it and keep coming back for more. The net profit after all fees and costs are factored in is 157%. Not quite 300% but hey - what other investment have you made lately with that kind of return??
The best part is they pay me instantly , and Paypal does the currency conversion and collection. I thought I should mention that I had to endure the "fish eye" from my wife for 10 days after I bought the first 6 items for what was at the time thought to be an over inflated price. I'm really glad I was able to stumble across a way to sell these for a profit. And stumbling across this profit center makes me look around and think "What else can we sell to pay some bills?" There is opportunity everywhere.

Here's an update as of Monday. 16 items left to sell. This is after paying for my lunch at a fine local burger establishment.