And so here we have the first (and probably last) ever video review I've done:
Details on the two newer suitcases:
International Traveler IT-0-1 is listed as a 3.7 lb weight for the 16-inch bag (which is actually 17 inches in length). I got it for just over $65 including shipping on clearance.
Skway Ultralite is listed as a 21 inch bag (in reality 23 inches in total length), and 5.2 lbs. I got mine for $40 but got an amazing deal on it. You're more likely to find it for around $70-$75.
You can still find the older Skyway No Weight online (it also sells under the Union Bay label) in a few corners of the Internet, but I can't say I'd recommend it unless you really like everything I described about it and can stomach the extra three pounds, or it's critical for you to be for-sure under 22 inches. That's not usually the case for me, and yet I can't bring myself to get rid of it, because that bag really served me well in Europe.
I tested the weights on all of them with an analog luggage scale and they're pretty close to what was listed.