Any of these worth getting?
Turning Point 2004
Victory Road 2004
Victory Road 2007
I recommend all of them except the two Victory Roads. The 2007 show is pretty much all tag team matches. If you want a good TNA ppv from Summer 2007, check out Slammiversary. And the first VR from 2004 is pretty weak but notable for being the first TNA ppv ever. I recommend it only if you want to see how it all started.
-Lockdown 2005 was a great start to the franchise: XScape match, Jeff Hardy vs. Raven, AMW vs. Team Canada, Christopher Daniels clashing with his former tag team partner, Elix Skipper, and a classic main event in Styles/Abyss.
-Turning Point 2004 had a solid tag title match, a good x division six-man, a fun hardcore match with Monty Brown and Abyss, DDP vs. Raven, Petey Williams vs. Chris Sabin, which is a perfect matchup, a good six-man tag, and another classic main event in Triple X vs. AMW.
-Slammiversary 2008 has all solid matches: Petey Williams vs. Kazarian is a great opener,solid six-woman tag match, LAX vs. Team 3D, but better because it's really a classic formula for a tag match, and not like the garbage matches they had in 2007, AJ Styles vs. Kurt Angle, which is very good, and a solid main event in KOTM.