There's plenty of new markets which failed to take off, and died after a few years of use. Confederate dollars aren't quite the useful currency they once were, as an obvious example.
Otherwise it cuts too close to survivorship bias: is there a popular asset where the market has "low liquidity and crappy technology"?
Yes, real estate.
I bet they're having even more legal difficulties though, as just running a regular share exchange requires a team of top notch lawyers to keep abreast of the huge volume of exchange laws. I doubt poor MtGox even has 1 full time qualified lawyer and they're dealing with entirely new legal ground.
The top sellers of mining hardware that I could find on Google (Butterfly Labs, Advanced Miners, Cointerra) all accept Bitcoin for payment.
Are you referring to some group upstream of the hardware sellers? I'm curious where you're getting this information from...
^ points out some nice parallels between the "Bitcoin rush" and the California gold rush. One of the points he makes is that it wasn't the miners, by and large, who ended up rich. It was the people who sold equipment and supplies to the miners. The namesake of Stanford University was one of them, interestingly.
There may eventually be a time where trading in bitcoins is productive, but for now it is a bit risky.