Don't get too excited. They are not worth that much!!
The CX100's will undoubtedly have foam rot unless your relative had them refoamed or had new drivers fitted. Unlikely, so probably worth £50 if they are spotless.
The TV is probably worth £35-£50 on ebay if it has a working remote.
Enthusiasts are a great bunch but generally don't want to pay much and those that are interested will be thin on the ground even on here.
You could try giving them away but that is not guaranteed to work!!
Ebay will generally get you a better price.