Weighing in cat

Just been to weigh in the cat I removed from my Clio and a one I had from my old ka got told I would only get £15 for the Clio one and £8 for the ka one is that right or are they trying to pull a fast one?
 
Yeah I got told it's platinum but he tried saying that it's off a high performance car and it's more steal then anything else and that the other cat was off a small car so no good :-/ trying there luck I think
 
A eurocat, a cheap aftermarket cat will only be worth a few pounds but any genuine part, ie a ford part, a renault part will be worth a good £40/50 with some newer car worth even more.

Take them somewere else.