I had a tupperware party a couple of weeks ago. I got my hubby to take the outside order form to work with him to get some extra sales, and with that and the people that came, sold almost $900 of tupperware. If you get over $595 in sales and 2 party bookings you get the alfresco set ($170 worth), plus the host gift of the month (I got 2 medium alfresco bowls with servers), and if you get over that you get money to spend on more tupperware. Not bad I reckon, a good way to get tupperware fairly cheap - just buy the ingredients for the recipe (not sure if all demonstrators do it the same) - I had a Sangria cocktail party as my recipe and it was a huge success.
The demonstrator told me for a successful party, you need to get about 10 people there, and to invite double what you want to come cos about half turn down the offer.
And re: Christmas, they have some special releases for Christmas at the minute - plus could make good pressies!
All the best,