How much does a 1984 olympic games series canon T50 camera cost?

it originally sold for $350. I see them on ebay for $15-$60. I have one in the original box, unused with all the filters and accessories, manuals etc. and I can't see how it isn't worth far more. Of course I also bought my wife a couple of TLR's so my taste might be questionable. I finally made the digital transition and wish I could buy a digital back for one of these.