Not necessarily a deal breaker if the price is good enough to justify that issue.

Or if it was mailed USPS with tracking, that should be good enough.  

You said: "His agent says the seller is willing to meet with me in person to show me his documents and answer any of my questions"That should be good enough for you if you are serious about the property.

The quality of renovation was average and just good enough to get it rented out as quickly as possible.

@Evelyn CastilloHard money loans are are short term interest only loans and are made for short term now you can use them and the same lender can give you a long term loan as a refinance around 7% and if you find a good enough deal you could still cashflow.

There isn't good enough reason to purchase a home for higher than value when there are other homes in the US that will provide both positive cash flow and equity.

And that's good enough.

Thats good enough if you have a couple HCVs. 

good enough for you, negative types?

If you are going to be a buy and hold guy - be that, and buy whenever you find a deal good enough to buy, regardless of market cycle.