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I recommend you remove the footer due to the simple fact that it is blatant keyword stuffing. Instead write some focused copy for each category of your website that emphasis each of these items: e.g., write some content about diamong rings, a category blurb or paragraph, on the page that lists all of your diamond rings; write a bit of content for cross pendants on the page that shows you cross pendants.

For the home page write some content that relates to diamond jewlerey. That way your keywords break down and get more focused the deeper you navigate into the site structure. Think about it like refining a search for a library book.

General Topic -> Broad topic -> Specific Topic -> Sub topic

I hope that helps!

Matt may have mentioned that more is possible, but he also mentioned that he stil recommends you keep the link count at 100 or less ( http://www.mattcutts.com/blog/how-many-links-per-page/ .) In terms of LinkJuice and PR flow, having that many links on a page is definitely not recommended in any cirumstance. Simply put, the value of Juice that is passed through your links is divided by the number of links on your page (no-follow or not).

So if you have 50 link juice points and 150 links, each link will get 0.333 points. (I am just using arbitrary number and the term points to make my point.)

I feel like your question answers itself, a site that generates no income before it is sold doesn't really have any value to be completely honest. If the site is ranking, and generating leads, then it has an intrinsic value of potential income. I feel it is a gamble and as Ben said "[it] is worth what they buyer will pay for it."

I suppose, if you have qualified leads being generated, you could place a market value on each lead with a realistic conversion rate factored in to get a base sale value. Once you have a base, you could project what it is worth to a company that can build a reputation and stronger business with it.

Using the above example of 500 visitors, 5% to leads, and a 1.5% conversion rate (lets be realistic now) works out to 1 client. So for this venture to be profitiable, you would probably need to generate at least 1000 * 5000 visitors a month, and hope for 5-10 clients. Now if a business buys this and makes it successful, the conversion rate should increase due to reputation. You could build a projected sale price of the 1-2 year projection.

That all being said, you really will need to have a decent amount of traffic coming to the site in order for it to be salable, or follow the old adage 'a sucker is born every minute' and swindle someone into buying based on promised traffic and revenue that is in fact not there (not recommend: very unprofessional and possibly reputation damaging.)

-- edit --

• clearly my math was wrong, it should be 5000 visitors for 5-10 clients, not 1000.

Anchor text is passed regardless if it is internal or external, essentially a link is a link no matter where it points to (a generalization sure, but true nevertheless.) What you need to be careful of is keyword stuffing. If you build all your internal links to widgets for sale in cityname it really is not going to look so good to users or search engines. Keep it civil and don't worry too much about keyword density, just make sure each page is focused on a unique set of keywords, the content is relevant, and the links that point to it from offsite contain some version of the keywords in the anchor text.

What most likely happened: Your site was offline, Search bots crawled the site and found nothing responding with a 404 error, or worse a 500 level error. There is a good chance that your site could have been crawled multiple times, and thus the search bots deemed your site gone, and thus your rankings fell.

The first and foremost thing you should do (and I assume you have) is restore your website. Being offline for only a few days should not have a long term effect on your rankings. It will simply take time for the search bots to recrawl all the links that you have built and determine that their is in fact a website on the other end of them again.

You should check webmaster tools for any errors and possibly ping your sitemap against the engines. Otherwise, I think it is best to carry on as normal, the rankings should return within a few weeks.

If I may be so bold, I would suggest looking in to a different hosting company, unless it was billing related, there is no excuse for going down for more than a couple of hours in today's market.