Well from what I can tell, both the link I posted, and the Ebay auction he posted. Are both for DTS only DVD's.
Both say it's the "Five star collection". So I'm betting they both were made from the same source, even though the cover art is not the same. Which is also probably why the Ebay seller has his "disclaimer" about how the cover art may not be the same as he shows in his AD. But yes, you would still get normal Dolby surround sound in pro-logic, unless they are DTS only disc.
But as for the DTS, I have no idea of what they are giving you with that. As the site I posted only says it digital 2.0 stereo sound. But we know that pro-logic surround is encoded within the 2 channel sound, if it's just normal surround sound.
Still, $45 + $5 S&H from the site I posted is better than paying the $60 that the Ebay auction is at right now, who knows what the final bid will be.