Looking to share a container from Florida to CR

We are looking to ship down some things, mostly furniture from South Florida, and it seems best that we find a way to share with others.
We have enough for maybe half of a 40 foot container.
I’ve looked into consolidated container shipping, and the price to fill less then half the 40 ft countainer costs about the same as filling up the whole thing.
There are two of us here in Quepos/Manuel Antonio, and we are looking for someone else interested in taking the other half.
Like I said, it will be almost all furniture, and perhaps a few odds and ends of used household items.
I am assuming that there will be a way that all parties can be assured that there is no “funny business” going on, so we can all feel comfortable that no one is bringing on anything that they are not supposed to.
From writing to a few of the shipping companies, it sounds like if everything is household items, then it is a pre-priced easy financial figure to come up with.
We can be ready pretty quickly, maybe sometime in April or May?
Lastly, we have been living here for a few years now, and we are quite sure now that we want these items, as we have exausted the sources here, unless someone on this forum has a great deal on Indian and Indonesian classical furniture…..It’s very expensive here for the “good stuff”
Ok, so we are very interested in making this happen, and we are not into any scam stuff so let us know if you are interested in looking into this together.
Mark.