At USRO; at least $50 [I]less than on Amazon:http://www.unclesamsretailoutlet.com/Fuel-Burner-p/7510.htm
Apparently will burn almost any liquid fuel.  Comes with a fuel bottle, which is very handy, as Optimus/Primus fuel bottles are pressure-rated, and will fit the unique valve/pump assembly, whereas MSR bottles may not do so.

Note that Optimus had a recall of some Nova stoves with a black body.  The stove pictured does NOT have a black body, but rather the GTG silver body.  If, for some reason you get a stove with a black body, there are instructions on the Optimus site http://www.optimusstoves.com/seen/service/nova-recall/ concerning how to return the stove for repair.

As with any stove like this, a field maintenance kit is a must-have.: http://www.optimusstoves.com/chen/optimus-products/products/katadynshopconnect/optimus-zubeh246r/grosses-ersatzteilset-f252r-nova-und-nova/

Other accessories here:http://www.optimusstoves.com/chen/optimus-products/products/katadynshopconnect/optimus-zubeh246r/.  The multi-tool and the folding windscreen would make my list, YMMV.

If you feel the need to quiet down the blowtorch-like sound of this type of stove, the QuietStove gizmo does the trick, all right.  Some claim it also conserves fuel a bit, and some claim a much improved simmering setting. http://www.amazon.com/gp/offer-listing/B00DT9S6FA

Lowest shipping option, for my location, is $14.05.  However, if one can find something else on their site that qualifies for free shipping (look for the little freight truck next to the price), and the total value of all items is a minimum of $100, the shipping on all items is free.  In this case, item(s) worth a minimum of $20.05 would have to be added for free shipping.

The trick with USRO is to examine all the shipping rates available, and this means playing around with the shipping options buttons.  Sometimes, there are pretty low "Flat Rate" prices available; one with a cutoff at $20.00, and the other with a cutoff at $50.00.  So, play around with the shipping options buttons.

I believe the Nova+ was introduced in order to eliminate the components that were prone to being mis-assembled at the factory on the original Nova stove.  The specs of both stoves, aside from the visible substitution of different components in the new stoves, are very similar.

The value of the included Optimus fuel bottle is about $17.95, so that has to be factored-in when comparing with other offerings of this stove.  As mentioned, the Optimus bottles are designed to work with this stove's unique pump assembly.  Other fuel bottles, even if pressure-rated types may not do so.