Being the mom of boy-girl twins, I covet this boy-girl portrait from Granite Pail Collectibles:

Don't you love the lace detail on the bonnet/collar? And the marbled look of the frame just takes the cake.
This silhouette from Leslie Antiques is unusual in depicting a bird perched on the subject's finger. It's also unusual in that it's painted, not cut -- the rarest of silhouette methods.

I particularly like how the detail on the back of the girl's dress gives her almost an angelic form.
As always, ebay remains a great place to pick up antiques deals, and silhouettes are no exception. When silhouette shopping, I find it useful to browse the ebay UK site at ebay.co.uk.
Currently up-for-grabs is this circa 1840 full-length silhouette of a young lady:

The artist saw fit to add the plaid checks on her dress, and I'm so glad that he did. Bid now before she's gone!