rear hub motor

I've been riding and loving my Pace 500 v1 for about a year now. However, I recently hit a big pot hole which seems to have messed up the hub motor. It now makes a griding sound when it is engaged, and prevents the rear wheel from spinning backwards. I'd like to order a replacement complete...

I had to purchase an entire rear wheel assembly for my New Series 700, as I accidentally bent the rim. I am trying to decide how much to sell the motor, and spokes for? There is 10 miles on the motor. Any input as to fair price, and where to advertise would be helpful.