I will promote you on my facebook page called 'Nike & Adidas'. As you can gather from the name, it is a sport related niche. I will only do shoutouts on sport related pages/products/websites/apps. My page has over 1 million likes and a good post reach. You can see it below.
The basic gig will provide you with a shoutout for 30 minutes. A lot of activity happens with 30 minutes anyway.
Facebook Page: https://www.facebook.com/Nike.Adidas.R.M/?fref=ts