I purchased 0.15 bitcoin earlier. I sent first and promptly received the coin.

That said, it is over 25 blocks since he sent the bitcoin and I still don't have any confirmations. I would recommend asking for a higher fee to be used if you purchase here. When you are paying over 10% in fees, it really should be expected to at least have enough fee to be confirmed in the first few blocks. Fees are very cheap nowadays.