There's not enough ladies here, and they'll be most of your customers; find a forum frequented mostly by ladies and ask this question there as well.<p>Myself:<p>- groceries;<p>- toiletries (If I'm out of deodorant / shaving cream / blades / toilet paper / paper towels / detergent and I need them stat, I'll pay extra).<p>- Printer supplies (printer ink out so I can't print while working towards a deadline? out of papers? I'll pay a premium), and maybe some other office supplies.<p>- Computer supplies: blank CDs, blank DVDs, USB flash drives, mice, keyboards, when these break.<p>- Cardboard boxes and other moving/packing supplies (I need to take things from one place to the other, and realized it's harder to carry/pack than I thought). Happened to me more than once.<p>- Batteries. Cheap, pre-activated, pay-as-you-go mobile phone for a guest-from-out-of-the-country or when I've lost my phone.<p>- Phone chargers and laptop chargers for when I've lost mine.<p>- Power cables, power strips, ...<p>- Small Ikea stuff; they charge >$100 for delivery of the simplest things; if I can get some stuff from you for $10, I'd gladly do that rather than drive to Ikea. The logistics might make this worthwhile for you.<p>Ladies are likely to have a very different list. I won't speculate here even though I know a few items my S/O would add.<p>Also, for some items, I'd pay premium if I could get them when the stores are closed - e.g., one hour delivery at 3pm, 11pm and 4am command different premiums; Similarly, rain, snow, sun and humidity would also command a different premium.<p>You can price such a service dynamically according to demand and your costs (read about "2nd price auctions" about a possible way to run the pricing process), which walmart can't (although ebay and amazon might)