I think a kilo mouse sold around the $1500 mark when spot was around $28. I have a 3 coin proof set also, love it. Was lucky enough to get it in 2010, still sitting in a coin shop display for same price as release.
Yes, I have a couple. Paid more than that, it was early in my stacking.. Even with the chance of more minted or released I would hope they are still worth upwards of the $1500 mark.. All academic at this point though, I love having them and not ready to let them go..still curious on value.
I asked the kg question at the PM's official blog, Stephen from PM said that KG coins could be ordered and will deliver to customers until 2019, which is end of series 2.
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