3DS is not basically like the DS because the 3DS got a region-code imprinted on it. So if you wanted to play 3DS games of other regions than your own, you would have to buy a 3DS of that region to play the game.
And if you look at the above list, you'll see that the DS games are all import, so you're basically "stuck" with Abyss on the 3DS. Which is not a bad thing, Abyss is awesome.
Cloud and Sephiroth - battling each other since '97 for your amusement Give it a rest already!
Well even if you have a PS3 that DOES play PS1 games on only import PS3 games on the PS3 have no region lockout import PS1 and PS2 games won't work unless you can find a way to install the games on the PS3's hard drive and run the games from their.
As in games on the PS3s hard drive work without region lockout either.
Yes Eternia's way too costly to buy as Destiny II on the PS1.
Tales of Destiny and Tales of Eternia can be played on an emulator pretty easily. PS1 Emulators don't have very high hardware requirements so those shouldn't seem restricted.
Tales of Destiny for PS1 is very slow paced, by the way. It does get a little bit faster as you go through the game though, but only a little. There are a lot of random encounters, the battles are slow, and the game can feel somewhat incoherent at times. Tales of Destiny R (PS2 import) fixed those problems and made Tales of Destiny R one of my favorites in the series, the translation guide available was pretty comprehensive and easy to use too.
Tales of Eternia seemed pretty bland to me. The battle system was nothing new and the characters were mediocre (except Max. Yeah!) The game is worth playing though, it wasn't bad.
I can't speak for any PS3 titles because I haven't played them. You can pick up Tales of Graces f if you're looking for localized titles. If you don't mind importing you could pick up Tales of Vesperia.