i bought some look px12s from sac and dont want them anymore. you can buy them for whatever they cost me which after shipping was like $90 I think. still in the box, brand new.
px12s but I don't know what they cost. My little brotehr who is 12 and 110 + or - pounds has these like 6 year old salomon bindings (I think they are called like, s508 or soething.) I saw them at sportchek for like $70 they are really crappy bindings but they wok good for him- don't eject too much and tehy are actually pretty light. I think the din goes up to like 7.
Go to you local shop and see if they have any bindings from previous years. If you buy them a year or two old, you can usually get them dirt cheap...Also, try to buy a binding that you are somewhere in the middle of the DIN, not at the very edge...