This weekend I used a coupon for $2 off on any bread purchase over $5. I ended up getting a loaf of artisan sourdough that normally cost about $6 for $4. If I had a party or special dinner I might spend more than $5 for a loaf of bread, but just for normal weekday consumption I doubt I'd be willing to pay more than $3.89 for a loaf under normal circumstances - that's my normal cutoff price at the local grocery stores.
I enjoy good beer. Now and then I think it's important to enjoy a bottle of Framboise, Thomas Hardy's, Fin du Monde or some other high quality beer that may cost $9 or more a bottle, but NORMALLY I buy beer in six packs and I'd say my usual weekday cutoff price for a six is maybe $10. More I really can't afford on a regular basis.
Wine? I can't see myself paying more than $14 a bottle on a weekday.
Coffee...first off, I don't buy any frou frou coffee. That means I've never spent a dime at a Starbucks. I might go to a local coffee house now and then and it's possible I might spend $4 for a cup in these circumstances but otherwise I'd put my normal weekday cutoff price on a cup of black coffee at maybe $2.50
What are your weekday cutoff prices? Feel free to add your own categories/purchases.