I think Steph's right.
Canada Post is safe, reliable and cheap. To pack the pump in a box with newspaper, insure it for a couple of bucks and send it off is pretty straightforward. It may not get there until March, however.
Certainly he's good for it; he's not going to ruin his reputation for $100. Others have had good dealings with him, and he's been diligent in clearing up any problems.
But in the end it's your decision, Jamie, oui?
Alan
