Model number: PS42C450B1W

I can't seem to get a definitive answer on google and wondered if anyone would know on here what the expected selling price of it would be. It's in excellent condition, has freeview and is HD enabled 42".

Simple. Check Ebay for completed listings. Check AVForums classified section for TVs and Projectors and see what they have actually sold for rather than just the asking price.

A quick look at Ebay suggests around £150~£155 for working models sold as "collect in person". Take off Ebay fees and you'd be looking at roughly £138~£142 I guess depending how you list it. It's a bit of a gamble though at there might be only one bidder.

Try a ForSale at AVForums. At least you can gauge interest and negotiate. FYI a 50" of the same model went for £260 a year ago. Perhaps start off at £170 for yours and see what happens.

What year did you originally buy this TV?