Players found they can buy and sell the same thing again and again to get rich

A shop with a discount for friends and a buy-back price looks fair, until rounding makes the sale price one coin higher than the purchase price on certain items. Your AI can test every price in your game for this and list the ones that print money.

Why this works

Prices are rounded to whole coins at both ends, and a rounding that goes up on the way out and down on the way in can create a gain from nothing. Looping over every price once finds all such items at once.

When not to use it

If the sell price is far below the buy price, such as a third, no rounding can close the gap and the check is not needed. It matters when the two rates are close, as with loyalty discounts.

In the full entry

• What to build, step by step
• Starting values and the reason for each
• 3 common mistakes and the fix
• 20 lines of example code with 3 checks that pass
• How your AI shows you that it works

Say this to your AI

Use the Spielerando entry "Players found they can buy and sell the same thing again and again to get rich" (read_entry rpg-shop-lets-players-make-free-gold) in my game. Build it step by step, and show me how you checked that it works.

Or skip this and connect the MCP: your AI then finds all of this by itself.Connect the MCP