My mother was gifted a Pioneer PDP503PU television, it is too big for her place so she wants to donate it, or sell it and donate the proceeds. It is mint, was practically unused - the good (and rich) friend that gave it to her claims they only used it maybe a dozen times.
She would like to have some idea of the value. I have searched CL, Ebay, etc. - it's an old TV (2004) and there's really nothing out there from which to estimate. From what I've read, this model also had pretty bad power supply issues, which is why you see those parts available everywhere, so that obviously affects value.
I'm thinking she'd be better off just donating the unit, it doesn't look to me that there's much of a market for this model.