This is the 4878th most frequent Japanese word.
特売
"特売" means "special sale" or "bargain sale."
In this instance, '特売' modifies '価格', describing prices that are special due to a sale.
特売価格に驚きました。
I was surprised by the special sale prices.
Here '特売' refers to the weekly sale event held by the store.
その店は毎週水曜に特売を行います。
That store holds a special sale every Wednesday.
Here, '特売' is used as a noun to describe items on sale.