Looking for best offer from a trusted vendor. I realize my account is new, but I am willing to work out a deal so that you and I are comfortable and happy with our transaction. Read my posts, I am no scammer, I am certainly a speculator though!
You: have a record of vending, be willing to chat with me prior to jumping into the transaction.
To comfort YOUR worries, I will draft a document with my identity attached and will sign, as proof that I intended the purchase with you, a verifiable document you could use to refute any potential chargeback (there won't be one since you'll provide the bitcoin). I will pay above market price for your convenience.
To comfort MY worries, I would like to complete the transaction in a sequence of smaller chunks, so that I am only risking you being a lying scoundrel in small pieces.
Please do respond! I will be online again in 4 hours looking to complete the transaction!
George Orwell had a name for what you just wrote -
double speak.