Ya that is a big question, do you have resell rights to all of these ebooks? I mean i have a collection myself but not 10,000 that I have master resell rights to. If you do then there might be a market for it. Alternatively you could sell them through clickbank and advertise on search engines. Even paypal has a community store.
I bind some furums of the webhostingtalk.com with a few mintues.
That is a powerful tools for build website web book. It can be used in Internet Papers Collection, Build Offline Website eBook, Build eStorybook, Build offline forum eBook, and so on.
Webinder is an easy to use, powerful and very fast download tool, also it is an offline browser and e-Document maker. With it, you can download your favorite webpages. All you need to do are just several clicks. Webinder can help you to put all files you have downloaded together into an independent compressed HTML-Help(.chm) file which is more portable and convenient.
The builded book(.chm) support full-text search and heading index, No additional software for starting and viewing the file is required, Webinder is a true powerful ebook builder.