Waiting 9 years for the success I got from Hayden Panettiere - 8x10 from Heroes that I had certified by PSA
Mail was forwarded to me from a house I lived at 2 years before over 4,000 km away on the other side of Canada
Postmark was 2679 days old (7 years, 4 months) and it still found me
My guess it was lost by Post Office and they went out of their way to find me - my SASE was unopened but inside another white TYVEX envelope from the PO labelled "damaged in transit" - thankfully the 8x10 was still in good shape

I also got Morgan Freeman which I heard was hard to get.

I got one from Clint Eastwood

I received an autograph from Christopher Lee on the exact item i sent and was returned to me in my sae which i also provided. Whats weird about that i hear you ask.... i received it exactly one year after he died.