bought a proof Buffalo for $1320 last year and the mint is selling the 2010s for $1610 at the moment. Those proof coins are very pretty and I intend to hold it unless gold doubles or something in which case I'd sell. Silver is doing better these days also. I collect a lot of silver coins because they've been so cheap. Also if you look at a pure proof silver coin it's always much shinnier than the coins make of nickel or other substances. Silver shines like no other.