The following unicorns are available on Gunbroker for those of you with deep pockets. Sadly, I don’t have the necessary depth to compete.
First up is a Colt 901 CSASS prototype. Only a few of these exist in the U.S.
Next is the first and second serial numbers produced of the SP6920/M4 Carbine Sporter. Serials SP500,000 and SP500,001
And an original Colt USMC marked M45A1 CQBP model 1911.
Get on over there and make your bid!