An Avon Rep friend of mine has had great success with this idea.
What she does is make up a big basket full of all her old stock and tells her customers that they can win it simply by placing an order of $20 or more.
She gives her customers 1 entry for a $20 order, 2 entries for a $40 order, 3 entries for a $60 order, and so forth.
The effect this has is that if a customer places say a $35 order, they are more willing to spend an extra $5 dollars just to get an extra entry into the drawing!
It gives her sales a huge boost at this time of year.