Okay, if you assume that the value of the wine does not increase [which would be a lousy assumption if, back in the good ol’ days, you bought a several pallets of Truchot or Juge], and if you assume that the value of the wine does not decrease [which would be a lousy assumption if you’re sitting on a bunch of Cali Pinot], and if you assume no ambient inflation or deflation of the fiat currency [only God knows whether that’s a good assumption], and assuming one lump-sum payment per year, and assuming constant rates of return on the investment, and assuming blah blah blah blah blah, then here go the “Time Value of Money” calcualations.
[I think these numbers are roughly correct, but I copied them by hand from a calculator program, so there could be massive errors…]
Anyway, after ten years [plus a day], 2.5% constant annual returns, on 11 annual payments of $400, gives you a grand total of $4993.39.
2.5%, 21 payments of $400 [20 years + 1 day]: $10,873.31
2.5%, 31 payments of $400 [30 years + 1 day]: $18,400.11
5.0%, 11 payments of $400 [10 years]: $5682.71
5.0%, 21 payments of $400 [20 years]: $14,287.70
5.0%, 31 payments of $400 [30 years]: $28,304.32
7.5%, 11 payments of $400 [10 years]: $6483.25
7.5%, 21 payments of $400 [20 years]: $19,021.01
7.5%, 31 payments of $400 [30 years]: $44,861.74
10.0%, 11 payments of $400 [10 years]: $7412.47
10.0%, 21 payments of $400 [20 years]: $25,601.00
10.0%, 31 payments of $400 [30 years]: $72,777.37