You're right. I shouldn't have claimed you were a trader/dealer.
I was simply using the term to denote someone who sells a fair amount of cars over a short period, and by my count you've sold/have for sale about 6 cars over the last 3-4 months.
If you're buying them for a quick bit of fun and then selling them on at a loss, then of course you're not a trader. But if you're buying them, cleaning them up and selling them on, then 'trader' is the closest term I can think of - even if it is only a hobby.
Have you any more information from the previous owner as to why the car was written off considering it had so minor an amount of damage, or is the parts list just missing some bits (wheels, tyres, airbags, etc.)? Some photos of the accident damage would go a long way to assessing the claimed superficial/light damage caused.