Of course! I've bought tachs because I thought they were pretty groovy, or underdash gauges, hell, even the Vacuum Gauge/Economy meters just 'cuz they're neat. I'm guilty of the Hurst T-handle. I had one on the three-speed stick in my Gremlin for quite a while.

Probably the most expensive "hi-perf" item I ever bought was the R4B intake for my 401. I'm sure it's design is dated and performance is limited, but it is sort of legendary among the AMC crowd, so.... what the hell.

I'm currently trying to justify spending $1200 US on a set of very nice but used "Trendsetter" side pipes for an AMC Javelin. My car would look so bad-ass with them, but gosh darnit, that's a lot of scratch.