I owned my TZ for a short time. I enjoyed it a lot. When I moved it, I wasn't sorry to see it go.
That being said, I feel like you can get games NIB if your TZ sells appropriately. A HUO AC/DC Premium or even NIB Metallica or AC/DC premium is where I'd be looking. Also a nicely modded Tron Pro would fetch a similar price.
TZ is fun but compared to some of the newer faster games, with software that is a little less linear, it feels a bit dated. If you love the game you may want it back. If you do move it, play a game you think might be equally as fun, and also try to hold onto your investment a bit.