I got my standard to shoot great........with some massaging. I've got the "one piece at a time" MOA. for about the same price.
I have never held the gun you speak of but I was able to make a very respectable gun out of a brand new standard Vanguard. I replaced the stock, the trigger, floated the barrel and bedded the action. All on my time and my terms. Making sure it was exactly what I wanted.
Things I would think about (just thinking out loud)
How much do you know about that gun? How many rounds have been through it? Does the person take good care of their guns? Do they reload? What kinda loads have they been throwing down range?They may have shot hot round after hot round through it. If you can, ask that question and look at some reloading data to see where that falls in terms of hot to normal loads. If it's a private seller can you get them to throw in any brass, bullets, powder, dies?