Does it really matter that much what price you buy for? The range for buying is usually between 90 and 110 right? Even if you are buying thousands of turnips, you are only saving 50k-100k of bells by shopping around. That's hardly worth the bother if you are buying that many. You could make that back with a bit of bug or fish catching in the time it took to faff about with the online system, making multiple trips. I bought 5000 turnips this morning at 102 each. Since i had a decreasing trend last week, than means i only have a 5% chance of a decreasing trend this week, so i am almost guaranteed to make some sort of profit. Fingers crossed!