I would talk to them and tell them you will be doing maybe 20 price checks and a lot of HPI checks and see what they can offer you.
I only pay around 40p for a basic vehicle check and then another 40p or so for each valuation and have been doing this for years?
well the fact you are exporting repaied cat c/d cars and I assume not mentioning it you're on sticky ground, I still think its high time autotrader allowed buyers to filter cat c/d cars