Vintage Synth Repair

Hello Friends,
  I recently sold a modified Casio on ebay. The buyer sent me a 
check, I cashed it, and shipped it with insurance. Good move. The 
buyer contacted me upon arrival, and said the box had a huge gash in 
the side, and the end had come off. After he plugged it in, he said 
the keyboard did none of the modifications, and only the 3 notes per 
octave worked. So it's very damaged.

  He bought the keyboard for $200 (minus shipping) and I insured it 
for that much. So, he's shipping it back to me, and I have to claim 
the insurance with my receipts etc.

  So, my question is this: If I claim a total loss, will they give me 
the money and keep the keyboard? I have a spare model, so I could 
swap boards and repair it (which I plan to do), how would I claim 
repair costs?

Thanks a 1,000,000
-Mike Walters
www.mysterycircuits.com