Here's list of recent Speedster prices - 1 Brit # = $1.25
Old Speedsters have moved beyond even weekend drivers in price. A replica is a far better driver. It won't greatly appreciate like the real thing - but the joy of driving it and inexpensive maintenance is a blast. In Miami you don't want an old German metal car- rust never sleeps. Plus you'll probably want the convenience of air condition and probably more that 90 horse power.
Take a look at the IM Convertible D for sale by Marty G. Very authentic, comfortable, reliable and fast (AC/heat from a Turbo Subaru engine). Plus weather resistant and safety of better visibility.
I posted a link to an imaginary internet friend's Dean Jeffries' Carrera Coupe a month or so ago. He sold it through Bonhams at Quail last year for $425,000. There wasn't a Speester in that sale that sold for less than $500K. The Carreras were closer to a million. Granted, it's Bonhams at Quail, but still.