I have one of these long-reach dusters that I bought somewhere else, but I just found it at Dr. Leonard's--a fun site that sells all those "As Seen on TV" products among other things. I think I paid close to $10 for mine. So, at $2.99, it's a deal.
The duster is great. I use it to clean under appliances and bookshelves--it's especially useful for cleaning under the refigerator and stove.
Dr. Leonard's offers free standard shipping on all orders and charges a handling fee of $2.95 per order.