Vechicle Searcher.com - any body know anything about?

Selling a car, have it advertised in auto trader.
Got a call (well 4 actually , couldn't answer phone) from this company, sayingbasically that they had someone interested in my car and were looking to them for finance, if I could pay them €102 to hold the car then some one would be coming to look at my car, and then I would get my money back?

I have no notion of giving money, told them I am not interested but wondering what is the 'real deal'?

Hang up if you get any call for a company looking for a fee to sell you car....

Oh ya I know but. . .
it wasn't a fee to sell my car, 'it was a deposit to hold the car for their customer which was fully refundable'!!
As I say I am going to have no dealings with this company, my car will sell itself , but just raising awareness really and nosey to know if anyone else has been contacted!