This is another one of those ULTRA-YMMV, one story only, type of deals. I remember about a year ago a guys posted a similar thread about a WM in South Carolina, with similar HUGE markdowns on fairly recent titles. There must have been some kind of rogue electronics manager about to leave the company or something, because some of those prices are outrageous.
Don't want to burst anyone's bubble, but I can 99% guarantee you that these prices will not be found in your local WM's (unless you live in Amarillo, TX), as their clearance pricing is always the extreme definition of YMMV: almost always on a store-by-store basis.
But, like I've said in many WM-related threads before, it's always worth it to check out what a local store has, because you never know when you'll find some gems like this guy. For instance, one of the WM's I sometimes visit put out about 15 MINT copies of the COD: Black Ops Prestige Edition (for both consoles) about 2-3 months ago, out of the blue. I just went in one day, and they had an entire endcap in electronics devoted to them. If you go to a lot of stores, you might find 1-2 copies of this game still around, but for the most part, they are long gone from retail establishments. One of the CSR's I talked to told me that they had basically been put in the back of the store shortly after they released (took up too much display space), and then basically forgotten about for 1.5 years. He told me that the department manager was actually going to put them on clearance for $30, but he reminded her that the regular copy of the game was still $40-50 there (drat!). So they put them up for a more reasonable $75. I wouldn't ever even suggest someone to go look for this at their local store, because if they do have a copy of two, they will almost certainly be at full MSRP, not the greatly reduced price I found.
Congrats to the OP, though. Those are some incredible prices! If I was anywhere near you, I'd have to drop in for a look myself.