Collecting

My husband and I have decided to collect vintatge crime paperbacks and picked up four this weekend-all under $3.50 and consequently not very valuable. We got a copy of Laura, The Thin Man, a Vin Packer novel and an Ed McBain.
This is not our first collection. Over the years, because we like to prowl around junk shops, we have collected everything. For instance, we collected postcards of Ocean City, Jersey briefly. Ones that had been sent to someone. My favorite read "Dear Myrta, I am still intact. Cold but fine weather here. Best wishes, L.C.
We also collected photographs of weddings for a bit and displayed them in a fan-shaped holder. I got tired of people asking if they were my parents and looking shocked when I said I had no idea who they were. It just seemed such intimate pictures needed rescuing from a junk shop. But it turned out, they can't be rescued by strangers.
We have also collected Mexican pottery, white candlesticks, water pitchers, Frankoma pottery, old cook books, books by obscure poets, carnival prizes, stones.
The main criteria has always been it must be cheap. We've never paid more than ten dollars or so for anything. Usually under five.
What do you collect? Or are we the only ones?