I'm convinced the reality is that it is worth a negative amount of money.
Hard to tell without seeing more of it but I can't see anything of much value in any of the few pics he's bothered to post.
A lot depends on what the disposal coat is for the large percentage of rubbish.
I found one figure of $165/tonne for general commercial waste
http://www.emrc.org.au/fees-and-charges.html
I agree with you.
It also gets complicated, because some metals (e.g. Copper), became very valuable. But I think the metals market value, later fell. I don't really keep on eye on metal prices, so I'm not sure about the current situation.
It could be that some of his stuff DOES have lots of valuable metal types.
At the end of the day, it looks to me like the seller, has not really got over their problems yet. If they want to sell it (if it has any value at all, and just simply needs to be got rid of), he has to be massively more realistic about the price/value.
Reading the ebay advert, it seems he is also explaining that it is because he has spent so much of his time, doing things with the e-waste, that he has exaggerated its value. I think that is his mistake. It is worth whatever it is worth. If he has wasted thousands of hours collecting and messing with it, it does not make it worth more money. Unless he successfully extracted valuable parts/metals from it.
This story is SO sad. He still has NOT got over his problems. The latest message, is someone kindly offering to come round and buy some of his stuff (which is a good/useful offer). Politely saying he CAN'T afford the $2,500,000. But the seller REFUSES. So sad/silly really.
Q: Hey Mate, Would you allow me to come pick out a pallet load or 2 and pay cash on the day, wont waste your time but cant afford the whole lot 02-Sep-16
A: Hello and thank you for your offer but im looking to sell it all to one buyer and so far im getting a few messages for them it looks like it should sell If you would like to buy it all and give me a good offer and i will consider but for now i will wait If anything changes i will let you know Thank you and have a nice weekend
Please, if you are the seller, please, please, please, let him buy some of it. You will then get closer to having it all gone.