I seem to have started something here so just a thought or two.
I used to find that epoxy was easily broken down with paint stipper, e.g. Nitromors or similar, some years since I did it though, the formula of the stripper and the epoxy may have changed since?
I think ebay has been good and bad. I think it is a pity that some of the toy fairs/swapmeets have declined or stopped operating since the advent of ebay and it has certainly had an effect on those model shops that used to carry good secondhand stuff, many have closed. On the other hand I lost count of the time and money I spent trawling around looking for particular items, I accept I enjoyed browsing through what was on offer but often came away with nothing.
The plus side of ebay is that there is more stuff available, often small items you would have struggled to find in those big mixed boxes hidden under the table. My son tells me the reason people pay silly prices is firstly that you don`t have to go out to look, you sit there and play on the screen and it arrives by post. Secondly he thinks people don`t consider Paypal is real money, people don`t think of it in the same way as handing over cash.
People who buy things on ebay are not forced to pay over the odds, it`s their choice. If you want loco X or Kit Y you can see if it`s on ebay and pay what you are prepared to. If you think it`s been bid up too high then don`t buy it. If you want to you can spend the next 5 years going to toy fairs, swapmeets and shops looking for it. If you can find it then lucky you. In my experience if something on ebay goes over the top in price there will be another one along fairly soon.