These are the boots I wear. I've had them for a couple of months and they're working out fine. Before this I had a pair of them without the side zipper, the pair lasted for about 3 years (they're still in ok shape, I just wanted less worn-down heels). Magnum is an ok brand. Lot of cops wear these for the mobility, durability and "stealth," though they're nowhere near as stealthy as less durable boots (if this even matters to you).
If you're going in for combat boots of some kind, consider where you'll be wearing them.. they're designed for specific climate/surface conditions. If you get jungle boots they'll be airy and more water resistant than most boots, but walking around on concrete all the time will wear the sole down fast. I also avoid models with steel toe because I wear them year-round and they get colder in the winter (in my experience). Also weighs more, costs more.
Check your local surplus store (if there's a good one). They frequently have brand new shoes at lower prices, sometimes much lower if there are slight defects. Some paratrooper or imported boots look pretty odd as well if that appeals to you for some reason (biker boots also look funny too of course, my dad wears them).
Good luck.
Same model I wear though, got them for $75 new. Wish I had seen that $50 cheapo site if it was happening a month ago.