Overstock.com offers the Baxton Studio Barbara Contemporary Queen Platform Bed with Crystal Button Tufting in Black (pictured) for $220.99. Add it to cart, then click this link to drop it to $198.89. With free shipping, that's the lowest total price we could find by $22, although most stores charge $280 or more. Note that the mattress, box springs, and bedding are not included.
Of note, it's also available in Full size in Black or White for $172.99 before clicking the above discount link, $155.69 after. With free shipping, that's the lowest total price we could find by $93.