Although the availability of unique products would be interesting I am afraid you'll find (and anyone who has lived abroad outside of the military can probably attest to this) the shipping
costs are atrocious!
Like really really really atrocious.
Plus often times it can take 2-3 months for a package to make the journey from wherever to wherever.
Assuming you could make the cost logistics work, you'd have to wait to market the products till a friend in the US could receive them, otherwise the likelihood of someone willingly waiting months on end for their rare antique hand crafted whatsamajigit is not very likely.
Now, turning one of your cabins into a store house of things like spices and goodies from back home that you could sell to other expats at a premium...now that might work.
I've seen a single
serve bag of Prawn Cocktail Walkers (Lays) crisps go for $5 easy and they only run you 60 cents normally.