You have a few options for getting the content into SharePoint. None are
very good.
a. Create a library of web part pages, each with a Page Viewer Web
Part. The URL property of the web part should be pointed to an existing ASP
page. This is fairly easy but extremely monotonous to set up, especially if
you have a lot of pages. This also requires that you keep the original ASP
web server online. This would display the entire page (banner, menu,
content, footer, etc) in the SharePoint page, which could be quite awkward
or unattractive.
b. Use a Content Editor Web Part instead. You'll have to cut and paste
the relevant content and associated HTML code from the old page to the new
page. Depending on how you coded the original pages, this could be very
difficult. This would allow you to shut off the old server, though. This
approach would allow you to select only the content, so would probably be
more attractive and less troublesome.
c. Hire someone to do it for you. You can probably get someone to do
the work over the web. I am not sure what sort of rate you would have to
pay, perhaps $15-$20 per hour, or you might be able to negotiate a per page
rate. Perhaps someone else can jump in here with a better estimnate for this
type of work.
If you can post a URL to the ASP site, folks can take a look and perhaps
offer some specific recommendations.