I said it in the other thread, and I'll say it here too. Sewing machines are NOT a good investment, unless you have a sewing business and they will pay for themselves.
There is no doubt in mind mind that if I was to die tomorrow, and William got his wish and got to sell my machines, he will in no way get what was paid for the modern machines, and being as we're talking about tomorrow, I doubt he'd get what we paid for the antique/vintage machines! (In this economy!) He'd get more for the ones I got excellent deals on, and less for those I paid a bit more for.
If you want the Singer Anniversary edition because you like and want it and it makes you happy, then by all means, go for it. If you buy it because you think you'll make money on it...well...you already know what I think there...