Wow. Two things about this statement are mind-blowing 7 years later...
Highest savings rate a popular bank pays now is 0.9%.
I don't even know how much gold has appreciated since then.
Ok my ching (whatever that means):
Most I paid for a coin for the first 10+ years I collected:
$380 (at the time) for this 1941 PF66 Walking Liberty
That was surpassed by this:
http://omnicoin.com/coins/979194.jpg
1928 $1 - silver Peace dollar struck at the Philadelphia mint. This is one of two keys of the series at a mintage of 360,649, almost 500,000 less than the next rarest. I'd give it about MS-64. I think I paid about $450 or $500 (or maybe a bit more) for this. Worth it as I needed it and wanted it for years.
And the most I've paid (that I can remember for sure) for a note:
1928 $1 silver certificate STAR note (good for one dollar of silver when redeemed) - signatures of Tate and Mellon - Friedberg # 1600*. Certified Choice New 63 by PCGS. Don't have the mintages nearby. Paid $500 for her.
I was impressed that I didn't see higher figures listed by you guys. I've only been in this range a few times but always for coins/notes I have been searching for for years and need for my series collections.
Also, I've been on this forum long enough to know a few of you are politely holding back