Shopping a Sale on Etsy

Hypothetical Question?

Which is most important for you when purchasing from a store advertising a sale?
Would you be more interested or tempted to buy if the shop offered:

(a) free shipping

(b) a percentage off the item

(c) a BOGO sale (buy one get one) type sale

(d) a percentage off a future purchase?


For all that say all of the above, that's not a choice!! LOL!!
I'm just curious; it's always been a burning question I wanted to ask.