Sorry to hear of your loss...but someone will be happy to take over the care & feeding of your brother's trailer. The Forum is a great place to start...post any questions &/or pictures and we'll do the best we can to help you out.
You may want to check out Vintage Archives
to help identify what year/model it is. Also, Price vs Condition
to help you set a price.
One more thing...a bunch of folks here on the forum have set-up a network to help each other out inspecting trailers. You may want to check out the list in this thread
for someone near you, then PM them for help.