I got 2 questions for my new project

Hi black hatters!

I'm currently doing a project, where the main idea goes like this: (Feel free to get inspired )

1. Buying an expired domain with a lot of external links (High Majestic Trust/Citation flow and OSE Domain/Page authority as well).
2. Creating a price comparison site, with products in the same niche as the domain was active in before.
3. Launch a big amount of products to the site with product feeds etc.

Domain authority + a lot of products/URLs = Long tail traffic.

I already know how to do SEO pretty well, and i know how to make sure to get 100 % advantage of the links going to the site. (No juice is spilled )

1. If you should give me your best advice or idea on this project, what would it be?
2. Since i want to boost the domains authority, with linking to all the new products/URLs that I'm creating, which link building technique or service would you recommend for this? Often link building services focus on keywords/URLs, and i just need random links to random products/URLs.

Have a lovely day!

Pulling that off depends on two things:
a) Do you get it minutes after it expires?
b) Was private whois enabled before? (If it was, you just need to have it enabled right after you buy it)

If you can have everything looking the same on the domain you will get the value of those links. Use waybackmachine to use a similar (or same) theme and structure, and after a while just change it the way you want it. I've been testing this out, and sometimes Google doesn't give any extra value (except maybe if the PR stays the same) if they notice the domain has been dropped.

Thanks for your reply!

A) I didn't, but it was under 24 hours. (But i first activated 2 weeks later or so)
B) In my country you actually can't get a WhoIs on your domain.

I didn't in this case (i do for my private link network though). After a short time it had a PR 5, but today it actually turned down to a PR 2 today. Anyway my rankings are the same (and it performs pretty well, even that it's all feeded low quality content.)