A bit of "fine print" in this deal but if you're looking for a good scope for a good price here's the skinny:
Nikon has their BDC days rebates going which includes a $30 rebate on the model in question: http://nikonpromo.com/assets/bdc/bdc_days_web_form.pdf
Amazon sells the scope for $139.99 shipped, however it's currently on backorder. Click this link and you'll see a higher price, however....
http://www.amazon.com/gp/product/B004MY5L9U
... look over on the right side of your web browser under the "More Buying Choices" menu option - you'll see Amazon offers the scope for $139.99 but it's Temporarily Out of Stock. Click the "Add To Cart" button next to the price in question and then click up and "View Cart" to see it in your cart for the lower price and complete your order. Rebate is good through October 6th.
Enjoy -- J