目标的一个可能的解决方案，不一定是问题的标题:

Instead of serving up the special deal to everyone, serve it to random sets of ip addresses at a time. For instance, partition the IP space into 256 unique blocks, and at time=0, only allow people with ip addresses in the first block, and at time=5 seconds, allow people from the first block and the second block... until the last time slot arrives, and allow everyone to see the deal. One idea to randomize it would be to take the least significant bits of the md5/sha of their IP plus some salt based on the deal.

这将允许脚本编写人员拥有接近于零的响应时间，以及拥有多个ip地址的优势，但这将意味着给定的机器人与其他因ip地址而比他们“幸运”的客户相比没有任何优势。

将这一点与其他一些想法结合起来似乎是个好主意。

You should have some record of the users who have purchased BOC most often, why not just ban those accounts or something. Sure legit users will be banned in this process but you are a business providing a product and if your are being abused by a group of users and such you have the right to refuse service to them. You have a lot of info on your users including paypal and bank accounts, you could ban those accounts forcing the bot users to get new accounts. Certainly I could come up with a script to buy BOC all the time or just download one from the net, but I have better morals than that. Never actually having successfully purchased BOC, I know the frustration of legit users who would like to receive a BOC in the hopes of getting a great deal. Perhaps instead of offering a BOC as an individual item every once and awhile, you could just give it to random users every day. When they receive an item they get a little note and and an additional item saying they also received a BOC. Then the only way someone could get a BOC is if they legitimately purchased something that only an actual human would have wanted. There would be nothing better than purchasing a coffee maker or something and also receiving a 42" tv or something in addition to your legitimate purchase. I think the majority of script kiddies would no longer be interested in your site if in order to get a BOC they would also have to commit to a purchase of more than 10 dollars.

您可以尝试让脚本更难阅读价格。最简单的方法是将其转换为图像，但文本识别算法仍然可以解决这个问题。如果有足够多的脚本编写人员能够解决这个问题，您可以尝试对该图像应用类似验证码的东西，但显然是以牺牲用户体验为代价的。而不是图像，价格可以在一个flash应用程序。

或者，您可以尝试设计一种方法，以某种不影响呈现的方式在页面中“洗牌”HTML。我一时想不出一个好的例子，但我确信它在某种程度上是可行的。

如上所述，我在非验证码表单上做了一些工作，方法是使用存储在表单中的结果的预期值的预计算散列。这个想法适用于Wordpress的两个反垃圾邮件插件:WP-Morph和WP-HashCash。唯一的缺点是客户端浏览器必须能够解释JavaScript。

你不能完全阻止机器人，即使有验证码。但是，您可以让编写和维护机器人变得痛苦，从而减少机器人的数量。特别是强迫他们每天更新他们的机器人，你会让大多数人失去兴趣。

下面是一些让机器人更难编写的想法:

Require running a javascript function. Javascript makes it much more of a pain to write a bot. Maybe require a captcha if they aren't running javascript to still allow actual non-javascript users (minimal). Time the keystrokes when typing into the form (again via javascript). If it's not human-like then reject it. It's a pain to mimic human typing in a bot. Write your code to update your field ID's daily with a new random value. This will force them to update their bot daily which is a pain. Write your code to re-order your fields on a daily basis (obviously in some way that's not random to your users). If they're relying on the field order, this will trip them up and again force daily maintenance to their bot code. You could go even further and use Flash content. Flash is totally a pain to write a bot against.

一般来说，如果你开始采取一种不阻止他们的心态，而是让他们更加努力，你可能会实现你正在寻找的目标。

我同意上面的海报，他说有时卖的真的是一袋垃圾。

You appear to have come up with a business model which is serverly limited by the technology through which you are trying to deliver it. Yet like most tech minded individuals (not a crticism, after all that is the what this site is for) you are trying to come up with a technical solution. BUT THIS IS A BUSINESS PROBLEM. This is being caused by a failure in the technology, but that does not mean that technology is the answer. And most all solutions that anyone comes up with (and there will be many options) will in the end by bypassed by those determined to 'auto-buy' (for want of a better short description) your 'bags of crap'.

恕我直言，你问了错误的人错误的问题，你将在错误的解决方案上浪费大量的时间和资源。