I just picked up a 92 SVX to replace my XT-6. They are very unique in many ways, which kinda requires that you become a SVX enthusiast or you will become frustrated trying to find parts.
The biggest issue these cars have is the rear wheel bearings have a short <50K mile lifespan.
The brakes are undersized for a car that weighs 3,580-lbs and wear out quickly when driven aggressively.
The spark plugs are difficult to change due to proximity to unibody.
The OEM struts tend to fail before expected.
I've read that the catalytic converters are hard to find and cost a lot.
But, all of the above make them an epic poor mechanic's exotic dream car...and you can pick them up for under $1,000.