Buy one free (get the other half off)

Imagine if you gazed upon
All the signs in the store say free
I did that one time at the Valley Mall
No (Koil) not the one in New Orleans
I know it's crazy yeah
The notion is quite absurd
But, wouldn't it be cool
If without strings we saw that word
Buy one Free, get the other half off
Four for nothing, no need to scoff
No money needed, for these giveaways
Signs say free all over the place
Seventy five percent off
Of a fixed pro-bono price
Imagining discounts so wide
If it were true it would be nice