I recently got 6 novelty pencils with rubbers on in a pack from the 99p shop and Tescos have stationery bits and bobs for 50p pack or 3 for a pound and Wilkinsons have pencils, rubbers etc for about 36p a pack, often you get 3 or 4 items in a pack. I like to collect rubbers and GoGo crazybones I find in caches, but recently saw a Liliput Lane house (chipped) in a cache!