So he could be transported back to Jabba with minimal fuss, so Jabba could display him as a trophy, and to test the carbon-freezing process in preparation for freezing Luke for transport to the Emperor.
The last one was what I was looking for, being transported to Jabba and displayed as a trophy was a coincidental bonus.
5) Which Rebellion fighter had its name spoken by a character in one of the films?
His last word was "chances".
"Evacuate? In our moment of triumph? I think you overestimate their chances."
Nope, try again.
You may fire when ready.
Correctamundo.
7) What caused Boba Fett to fall into the Sarlaac?