I have had to consign THREE Amigas to the trashcan 
I did what I could and removed all socketed chips, and various bits like non-yellowed bottom half of cases and Kickstart switchers etc but the rest had to be sent off to the great recycler to the sky.
Sad day indeed when you can't rescue them.
(battery leakage on two A1500s and an A500 who's parts to repair cost more than the sale price of the machine due to horribly yellowed top case before anyone accuses me of murder)
Sounds like an Ebay issue and not that of an Amiga enthusiast. I am starting to realise that a lot of chat on this forum revolves around selling second hand computers. Anway.
So you threw away machines just because the motherboard was busted... Doesn`t sound like much of a rescue job unless you were just up for the challenge to sell them. Sorry to be blunt. But even with my very limited space I keep as much as I can and have projects on various rebuild cycles. The 1500s no doubt had the PSUs, cables, case etc which are even more difficult to replace than the motherboard. Heck, I even have an A1200 mobo in an A1500 case.
To anyone else, plaese ask others if they want stuff before doing the VERY LAST thing you should ever do which is chuck away. Once gone, its gone for good. If I am in striking distance I will always collect from you so a quick email. And I will pay for Amigas even if utterly broken.
That is so sad.
One I rebuilt over several months...
http://www.commodore-amiga-retro.com/amiga/amiga_scuzz201.htmhttp://www.commodore-amiga-retro.com/amiga/amiga_scuzz347.htmI shall say no more...
scuzz