Preventing Bots from instantly buying cheap items

There are bots instantly buying expensive uniques (if it listed cheap) even before it shows up on live search (on website). They are clearly using external programs and they high likely modified the game files and trade website API calls for abusing its load times.

Solutions:
- CAPTCHA for items if it listed recently. (And captcha will be removed after 1-5 minutes, and will no longer shows).
or,
- Disabling instantly buy for items for 1 minutes of its listing, and instead you can offer for 1 minutes. If no one made an offer, then instantly buy feature will be enabled. But this method is complicated to implement. But it will benefit casual players enormously.

Please GGG stop bots. They are harming the game economy

Had the same issue. Small streamer i was watching had an accident, placed item for 20 c instead of divs. I tried to buy it to save it for him, but the item never showed up on the trade site. It was bought shortly afterwards. Very sus to say the least. Well, accidents happen of course and there might be a reasonable explanation for that, but i add it as a datapoint...