The shop sells so expensive goods that I want to buy nothing

The shop sells so expensive goods that I want to buy nothing in it.为什么用so,不用such
语法：so + adj.+ 名词复数/不可数名词
语法书上是：
1) so + adj / adv +that
2) so + adj + a/an + 可数名词单数 + that
3) so + many /much /few / little + 名词 + that
1) such + a/ an + adj + 可数名词单数 + that
2) such + adj + 名词复数/不可数名词 + that
3) such + a lot of / lots of + 名词 + that