FWIW I had my V2 go south twice in 1999. Both times I sent it back to Mike Grace. He repaired the unit & returned it quickly. I can't recall if Mike even charged me, but if he did it wasn't much. Obviously we'd all prefer our gear to work 110% of the time...... but you know how these things go.
If you've got a good relationship w/ the seller I'd suggest asking him to cover the round trip shipping to Grace, and the cost of the repair.