一个英语句子的结构分析------------高手帮忙

一个英语句子的结构分析------------高手帮忙
A good deal is something few of us can afford to pass up.
1、首先分析定语从句所定的先行词是something还是 deal?
2、然后说明省略的关系代词是做afford的宾语还是做pass up的宾语?
3、something如何翻译?