Sales Run Too Slow

You need to promote your website more. 4.5k likes isn't helping you. That means you need to promote more and get more likes. If you get more likes then you would get more sales.
Try using addmefast, it is a social exchange website that helps you get more likes, and it would help you get more sales.
When you continue to get more and more likes, keep posting updates to your viewers and keep them interested. Make interesting pictures of your shirts which would attract more people towards your page.

How did you come about get that many likes? What are the demographics of all those FB users, and would they be the target market for your shirts? Have you tried regular FB ads to see if conversions improved?

If you're focused on selling via a social channel like Facebook, you've got to make sure that your page has content that will continue to drive traffic to your inventory.

Facebook is a really diverse platform, in terms of social content. It's good for imagery, video, text...all kinds of posts can go on Facebook.

That said, vary your content. Make sure you're not posting the same type of content all the time. Switch it up and keep things interesting.

Same goes for the actual content itself. Someone in the thread suggested coming up with interesting ways to showcase your inventory. This probably couldn't be more important.

There is a ton of interesting content and information on Facebook. Personally, my Facebook account is subscribed to a TON of fan pages for news sites, blogs, and the like.

As a result, my Facebook feed is just filled with news and content. It's typically where I wander when I'm looking for something to read on the Internet.

For YOU, this means you've got a lot of competition. It might not be enough to just toss a few pictures of your jeans up throughout the day. See what you can do to make your inventory interesting, and give your online shop a real personality.

_ Sean

Don't forget about the power of outside marketing as well- particularly sites like youtube, twitter, Pinterest (great for clothing items!), tumblr and other similar sites!

You could promote your page using Facebook advertising (I recommend using Promoted Posts as they seem to convert better). I know it may sound like a "duh" solution, but I did not see anyone mentioning this when I browsed the answers. Hope it helps.

As already been stated - 4.5k likes is nothing. I recommend you to get at least 10-15k likes before you start aggressively monetizing your page. Just invest what you had in profits so far to get new likes, use the optimized CPM newsfeed ads and you are good to go.