I will take a half off!
But some questions... I am guessing these are Forum Profiles? If this is so then the actual pages aren't high PR, but just the domain.
Actually... what is a valuation website? One of those that tells you what your site is worth? If this is the case then I can't imagine these links sticking for long.
And of course, you send out a report?
Let me explain it to you. In fact, the valuation website is a website that can stat or check the value of your website such as Alexa ranking, traffic statistic, PR, cache, and many more. Somehow this valuation website also like a recommend website. That mean once you build a baclink to this website, it will take your domain as a recommend website.
I just want to let you know that there are no such word as "permanent backlink" in backlink world. All the backlink will be permanent as long as nobody will take over your place... Thats all. In this case, it is same with my backlink... your site will be permanent as long as nobody want to take over your rank. I hope you will understand about this.
Google would glad to indexed most of high PR website. So, once you have done build backlink to these 700 valuation website. Your website domain will attach with these 700 valuation domain... Why we want to do this?? it is because we want our website to be indexed as a same time with these valuation website. Google will pinged and meta-indexed all of these valuation website frequently. Because of that, your website are also being indexed and your website ranking will move up slowly.