$10-15 mainly for adhesive. I didn't count the TM Challenge prizes in there because I don't use them. I can go to my stash for most everything else. When I worked at Archiver's it was like $30-40 a week.
I can go months and not spend anything, other months I may spend anywhere from $5 to $50. Here lately, I have been purchasing boy paper and embellishments for Kian's layouts but they have all been on sale. I could stand to go another several months and not buy anything other than adhesive.
Just spent $46 yesterday and the order has already shipped! Yippee!! I spend at least $50 a month. I have so much stuff but seem to always need something I don't have. Also at retreats they bring stuff that entices you and although you don't think you need it all of a sudden you do
I can go months without buying. Last month spent about $170-ish from three different places on stuff. Really depends on new collections and what I need (like adhesive or card bases) and what I want.