Agree with both UKjim and culzean, it's unlikely to put them off.
However, you could pocket a substantial amount of cash...
Ebay is a very funny place to buy & sell cats, nobody seems to understand the value of them. I've seen genuine, complete (not cut) Jazz mk1 cats sell for the best part of £400, I've seen several sell for £50 on buy-it-now. I've also watched used aftermarket BM cats listed by breakers sell for £150, 3X what they are new. It's bonkers!
I don't know what people think they are buying, but it's very lucrative for the breakers.