If you're looking for a rear-driver simply because you want a car that has a nicer handling balance than most common FWDs, there's very few within your price range. Possibly older 3-series cars (though the trailing-link suspension is very hard to modify around), a reasonably modified 190E, older W123s, or, stretching it a bit, S11 or S12 Silvias.
With Cefiros and 300Ds, you're looking at big, fat cars that will need some modification... the Cefiro isn't basically a four-door Silvia. It's a four-door Skyline... but the suspension is tuned more for a plush ride than for drifting. (and... hell... unless the old Skyline is a GTS-T or a GT-R, it's nothing more than a mid-sized cruiser, nothing to really get excited about, and nowhere near as much fun as a Silvia)
A 300D is a very nice car, very comfortable, but it's heavy as hell and plows like a cow. Maintenance is easier than for many European cars... there are Benz specialists everywhere, but don't expect it to be cheap.
If you can afford it, and afford to own it, though, I heartily recommend the 300D. Great car to pimp around in.
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Of course, if you're looking for a car that has
great handling, space-no-problem, then that opens up your choices... Starlets (oversteer, FTW), Miatas, older Corollas, Ford Escorts, Datsun 240Zs... though anything pre-1980 will need a ton of brake and suspension work to make them handle nearly as well or as predictably as a 1990's Civic.
If you can stretch for a non-turbo Silvia S13 or S14, those are excellent cars. Long wheelbase provides stability, but the weight balance is excellent and they're always on tiptoes and ready to swing out sideways at command. And the front seat is big enough, with rear seats for occassional passengers. The SR20DE engine is not that hard to care for, it's modern and powerful, and mods aplenty are available.
If you're afraid of conversions, find an expert, buy it in RHD and then have it converted yourself.