904 tranny rebuild

So I have no 2nd gear in my 66 dart...904 tranny....put a post on here and Charlie S found a tranny shop here in Deland, Fl. dropped the car off and they said I need a rebuild as the band is broken...no charge for inspection..Cost to rebuild..$900..Am I getting a fair deal???... I know 904's are easy to rebuild however I don't have the time or tools..etc...
Also, What would be a good rebuild kit?? 360/425hp engine....

Opinions please......thanks!