If it were mine, I'd pull it. Apart from anything else, it will be worth twice as much in a few years. 

A local Apple salesman/ reseller confided to me a couple of years ago that he had given away a Lisa back around 1995, little realizing what a functional Lisa would be worth ten years later. I reckon a boxed 550c will be worth a grand before long.

Click to expand...

If this was still functional for me, assuming the AC adapter, that has apparently given up the ghost since I've had it, is the culprit, I probably wouldn't have ever listed it in the first place. Or at the very least, doubled the price, as you surmise. Did you ever see the clear-plastic-cased engineer's prototype Color Classic that went for $5000 on eBay a few years ago? Apparently there were only 5 or 6 of them made that way in order to check inside clearances the easy way before the full production release. Talk about rare...