Probably my favorite piece of early Christian humor comes from the romance Gospel, "Acts of Thomas":
According to the lot, therefore, India fell unto Judas Thomas, which is also the twin: but he would not go, saying that by reason of the weakness of the flesh he could not travel, and 'I am an Hebrew man; how can I go amongst the Indians and preach the truth?' And as he thus reasoned and spake, the Saviour appeared unto him by night and saith to him: Fear not, Thomas, go thou unto India and preach the word there, for my grace is with thee. But he would not obey, saying: Whither thou wouldest send me, send me, but elsewhere, for unto the Indians I will not go.
2 And while he thus spake and thought, it chanced that there was there a certain merchant come from India whose name was Abbanes, sent from the King Gundaphorus [Gundaphorus is a historical personage who reigned over a part of India in the first century after Christ. His coins bear his name in Greek, as Hyndopheres], and having commandment from him to buy a carpenter and bring him unto him.
Now the Lord seeing him walking in the market-place at noon said unto him: Wouldest thou buy a carpenter? And he said to him: Yea. And the Lord said to him: I have a slave that is a carpenter and I desire to sell him. And so saying he showed him Thomas afar off, and agreed with him for three litrae of silver unstamped, and wrote a deed of sale, saying: I, Jesus, the son of Joseph the carpenter, acknowledge that I have sold my slave, Judas by name, unto thee Abbanes, a merchant of Gundaphorus, king of the Indians. And when the deed was finished, the Saviour took Judas Thomas and led him away to Abbanes the merchant, and when Abbanes saw him he said unto him: Is this thy master? And the apostle said: Yea, he is my Lord. And he said: I have bought thee of him. And thy apostle held his peace.