I have a 1988 420sel and it had the original Becker Grand Prix 780 in it but it was destroyed (along with the wood paneling) by the idiots who removed it to install the new stereo I bought recently. I am of course demanding that they cover all costs to repair the damages.

So I am trying to get an estimate on the value of the Becker and am a bit confused. I have found some on ebay for around $100 but have also found sites charging $300 - 500 for "rebuilt" beckers. What is the reason for such a difference in prices?

Basically, I need to figure out the fair market value of the Becker. I was planning to sell it on ebay before they ruined it but now it is damaged beyond repair. Any advice?

Here are a couple pics of the damage.

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