Samsonite via eBay offers the Samsonite Kombi 17" Laptop Backpack in Legion Blue or Black/ Brown for $64.99 with free shipping. That's the lowest price we could find by $17. It fits laptops up to 15.6".
Vinegar is arguably the most versatile product in your house. If you aren't using it for all of these purposes, you're probably wasting money.