Want to offer photo prop contest (x-posted)

[QTsmum]

I opened up an etsy shop (hand knit items) and I want to lean more towards photo prop items. I did a bunch of stuff for my aunt (she's a pro photographer) and I am just waiting on some pics from her, but she loves it all.

I was wanting to do a facebook-my shop contest and I narrowed it down to the prize being a semi-custom newborn photo prop set (chunky diaper cover and hat). The semi-custom part being that the winner decides girly, boyish or gender neutral!

So, is there somewhere on here in particular that I can offer this contest when I have it up and running (I was hoping by tonight or tomorrow...) or is that a no-no on here? (I wasn't sure, which is why I won't post any links yet! )

TIA for any help!

(I cross posted this in General...I had no clue where to ask! )