Yeah, that's what they cost new. Look up lowel omni (an older model) on ebay. They're much much cheaper. The reason they are better is that they produce cleaner light and burn at a higher color temperature. If you could look at the spectrum they produce, you'd see less spikes at certain frequencies which means better color representation.
I think for lighting your average rail, work lights do just fine. You can thrown them around, and if one breaks, you just buy another. They're almost disposable. A broken work light every month or so is no big deal, but a broken DP light is a big chunk out of the wallet.
The DP's are nice, but all you're really gaining is more control over your light. If you really need to control light spill, just buy a roll of black wrap, it will do the trick.
yeah i use a worklight with the stuff behind my house cause its easy to deal with the extension cord but for urbans just get a ton of the mad cheap handheld/stand lights like this kid is talkin about if you want to go cheap. theres like 8 dollar ones at home depot and places like that, grab 5 or so and theyll last you a few urban missions at least