Price gouging hurts the market just as much as over-pricing. All sellers are also buyers (unless they're broke/stupid) so dropping the prices on the smaller and less rare items just puts the bigger ones more out of reach. For a healthy market you need a balance and you don't get that by ridiculous under-cutting.
And yes, it's nice to find those items you want for cheap but when something drops from 50k to 27 over the span of about 10 posts, that's just ridiculous. And no, that's not an exaggeration, unfortunately.