Don't take this the wrong way but if your willing to spend 3k on an SS dagger then you need to buy some books and do some research
You cant just blow that sort of money then go on forums asking people what they think because it's too late then.i made the same mistake when i 1st started out but thankfully it was a ?150 army dagger and because of that i've never done it again.
Its all to easy to get stitched up buy a dealer claiming its 100% i see it all the time, hope this helps you out

Regards Sean