While most of the latter Saint-Gaudens $20s are rare, the situation with the 1928 Philadelphia-minted double eagle is completely different. Not only does it boast the highest mintage of any double eagle -- or any other pre-1933 United States gold coin for that matter -- but it was also saved in huge numbers. The 1928 Saint can be readily found in grades as high as MS65 and even MS66, though it becomes substantially rare higher than that. Registry set collectors vie for the relatively few pieces grading MS67 or higher, pushing prices for these coins well into five-figure territory.