It depends on my funds. If I don't have too much to spare, I just get one (or perhaps two cheapies). If I've got more, then I might get three or four toys. It's nice when I can get free shipping.
I'm trying to save right now after my most recent spree (I've spent a lot both here and at Barnes & Noble these past couple of months) - so I suppose it's a good thing that the particular color I want for my next item is out of stock!