I kept very little after we had DS because we were supposed to be "one and done" and our cousin had a boy 6 months later....
This time I am going to wait till past 12 weeks to start buying...(Diapers, onesies, bottles, ect. just the needs).
I did, however, break on black Friday this past year and bought a $234 neutral swing for $60 on Amazon. I couldn't pass it up and if, God forbid, something happens and we can't have another LO, we will donate or give it to a family that needs it.
IF I am pregnant by black Friday this year (staring TTC in April) I will be hitting A LOT of sales around then.....and also shopping through facebook local people (second hand).