Question about a PR5 domain

Hello folks,

I'm more than sure that some of you have more experience in this than I have, thus I'm looking for some information.

I discovered a very strong PR5 site (well actually domain, it doesn't have content anymore) that is being sold for $3000.

It has created in 2003 and never dropped since then. The domain name is pretty catchy (which is good), but more importantly, it has approx 200 referring domains from PR3-PR5 pages (including .gov , .edu).

All in all, it has very solid backlink profile. (DA 45, PA 55)

Why I'm interested in that domain is that I have a plan to create a niche site in the similar niche as the PR5 domain.

For example, the PR5 domain that is being sold was about something like:

"how to use emails", "how to browse on the internet", "how to use internet safely", "how to set up a site using HTML" etc.. In short, the basics about internet.

My "niche" site is going to talk about web design, web development etc.. So they are pretty much the same (I guess?)

Now here's my question: Is it worth buying it? Would Google pick it up and rank it well (since I'm in the same niche) or is it more or less like a fresh start without much benefit? I do think it gives a great benefit, but is that enough for $3k?