You buy car from E-Bay seller. Upon delivery, you discover problems. You contact seller. Seller says "you should have spoken to the mechanic as indicated in my ad". Seller accepts no responsibility and tells you to take it up with the mechanic.
Arms-length...
A contract whereby all parties of the contract are not connected in any way.
squared...
Yes, but you obviously do not.
Thus, given that the sale of his car is an arms length transaction, your criticism that "He answers questions @ an arms length" makes no sense and demonstrates your lack of understanding of the term.
Negotiations and discussions in an arms length transaction are done at . . . umm, arms length.
Providing incomplete, inaccurate, or evasive answers to questions is NOT "answering questions @ an arms length."