4 used DVDs for $10 at EBGames (YMMV)
 

Don't know if this is everywhere, but they had a display up at my local (Central MA) store. It is on any titles $5.99 and under, so the selection wasn't great. I got:

The Rock
In the Line of Fire SE
Basic
Tadpole

after using my EB card it was about $8.50 for all four.

As usual, it would be helpful if we knew where "local" is for you.

I live near Roseville, CA(kind of near Sacramento)-the deal they had was 3 $5.99 movies for some strange amount, like $6.59-I have a feeling it wasn't a nationwide thing, though.

I got 3 for $6.66...

Grateful Dead - From the Vault III

Forbidden Planet

Rumble Fish

I'm not even sure if the sale is going on in Maryland, but I found Planet of the Apes (2001) 2 Disc Special Edition for $5.99 at the Gaithersburg location and picked it up. Price seems low considering the single disc is the more prevalent one.

Everytime I go into EBGames, thier DVDs are marked at new or higher prices. I've never seen anything there at $5.99.

This is actually the tail end of this sale, Gamestop has been running it too. I got WWE Jake Roberts, Armageddon 2005, ECW's most Violent matches and ECW one night stand, all minty mint for $10.

What's the end date and what are they running in its place when it ends?

I don't think there is an "end date" I think they'll run it till they sell through the stock they have. When it started, it was 3/$10, and they had three bins full, then 4/$10 and now it is down to about 1/2 a bin.

At my local GameStop (Cicero, NY), the $5.99 DVDs are 3 for $10, which combined with the Buy 2 get 1 free promotion makes them 3 for $6.66, and if you have the 10% off card that makes them 3 for $6 total (+tax). All of my local EB's have the B2G1 sale, but don't have the 3 for $10.