The Olympus refurbished website has the 45mm f1.8 lens in stock at the moment. The price of $174 is roughly what you can get from ebay for a used copy, and is substantially lower than the price of the new lens (~$300).
This iens is great for portraits and has good reviews. Could be perfect for those who jumped onto the recent Olympus camera deal. As a micro four thirds lens, it should also fit other MFT cameras, especially those with in-body image stabilization.
If you have trouble getting to the product page from the link below, just google olympus refurbished lens, and you will find the page.