Rob - I would suggest adding some background information on the pieces, where found / purchased, etc. I assume the lack of responses are at least partially due to people questioning the authenticity of the pieces.
Most people that are members here don't buy often. I have bought at times if the price was cheap and I hold in hand. I never buy from a pic myself. I enjoy finding my own the most.
Rob - I can prove definitively that I'm not an expert, that being said I'm going to offer some thoughts. They're worth the same as all other unsolicited internet opinions - basically nothing.
From the pictures alone I think #1, #4 and #6 probably cover the cost of the purchase assuming of course that they're authentic. #2 looks a bit suspect to me. I think it's a Woodland blade but the notches seem unusual. The base looks ground so I don't really know what to make of it. #3 the form looks right, the material looks right, even the flaking looks right, but it gives me a funny feeling. #5 looks like an old blade but I'd check the tip under magnification to make sure someone didn't touch up tip nick on an otherwise nice blade.
If I dropped a couple hundred on the collection I'd probably send #1 off to be papered or otherwise have it reviewed by a knowledgeable set of eyes. If it comes back back I'd write the lot off. If it came back good I'd send them #3. If #3 is good I'd assume they're all good, except #2. I'd have a tough time unless a very learned person convinced me otherwise.
Thanks for sharing and I hope everything turns out for the good.