Congratulations on your find.
Meteorites are subject to supply and demand forces as to their values.
Science only needs a couple of grams to do all the work they need on the meteorite. If you donated some to be tested by a reputable research facility, then science probably has all they will ever need of your rock, so to science, the financial value is very low.
This leaves you to sell to the commercial market.
There is a strong demand for a few pounds of your meteorite at a fair normal price, then the rest you will not find a buyer for, as there is no one else in the world interested in buying them.
You could choose to price your rock at a lower than a fair price, and collectors will buy bigger pieces than they normally would because you are selling it at such a low price.
Or, you can choose to sell the rock to a meteorite dealer, who will buy it at a very low price, they will then invest the time and money to have it cut up. They will sell some to collectors, they will trade some with institutions that will part with other meteorites they have in their inventory that are surplus, and the dealers will trade some with other dealers that have surplus of other specimens in their inventory.
Now, to determine what the fair retail value is on your rock, we need to know what TYPE of meteorite the testing proved it to be. Without the documented 3rd party classification, no one will risk any money on buying it as there is too much uncertainty.
I hope this helps?
Steve