Apple will never sell a cheap upgrade to anything, but choices the firm has made about the MacBook Air mean even it can't wring all that much more cash out of buyers. Apple would never say this ...
TL;DR: Get a refurbished 13″ Apple MacBook Air (2017) with i5 1.8GHz processor, 8GB RAM and a 128GB SSD in Silver for its lowest price ever: $169.97 (reg. $999) from now until Dec. 7th at 11:59 p.m.