I bought CVS brand Benadryl for $3.99. The husband needed it as part of his tooth recovery. I thought about counting my prescriptions - but we don't really use that many prescriptions throughout the year and they are always under $5. Plus, that might be boarderline too personal - but obviously I'm not too concerned with being too personal.
OXYCLEAN! I needed more upholstry spray since my kids get my sofas disgusting. I was with my mother and she fronted the whole $4.16 - but I'm counting it towards my spending.