Hosting an event, need suggestions for films

Throughout the year my band hosts movie themed events, we give away door prizes, host costume contests, raffles etc… basically, we make sure no one in the audience goes home empty handed. I’m planning on hosting an Italo/Spaghetti Western night as our next offering and I’m looking for suggestions for inexpensive/budget DVD’s (individual movies and box sets) to give away that evening. I would greatly appreciate any and all input about your favorite bargain finds, pros and cons etc. and, if anyone could suggest films in the Public Domain that would also be helpful.