Idea with backlink spam on old domain

So i am currently in the testing phase, would appreciate some advice, i will post the update how it goes.

I am trying to purchase pr3 5 year old domain that is indexed in google for long time. When i get it i will spam it hard with every backlink source i have, xrumer, senuke, you name it. Then see results.

Currently namejet placed me on proxy bid that lasts 3 days and is private, just wtf is this? i thought the auction would end today as they stated but oh well...

I buy a parked domain since 2003 and have the same doubt