need advice which one looks like a better option

2006 Mazda RX-8 *Red velocity* Clean title RX8
or
2005 MAZDA RX8
or
2004 Rx8 4000$
or
mazda rx8 for sale
or
2004 mazda rx8
or
2004 mazda rx8 clean title sale or trade
or
2004 Mazda Rx8
or
RX8 MAZDA 2004 RX8

 

Looks like all automatics. Nobody mentioned service on the trans. That would worry me. The ones with replaced engines (mazda, not used) should get extra points. The 04 and 05 autos were only 4 port, down on power from the manuals those years.

If it were me, and I needed an auto, I would loo for an 06 plus, and find one where someone had changed the fluid somewhere around 2009. Or, make that the first thing you do when you get it, and then do it again in 6 months, then again 6 months after that. I am not a fan of trans flushes, just gently refresh the fluid. You will only get a fraction out at a time, but that also lets things change slowly.

Other than that, go by color, paint quality and price. None are green, so you are stuck with a second choice anyway...

Best I can do with the data provided, and probably the best I could do with more data.

 

^+1

In addition.
Take anything off that is greater than 8 years or 100k miles.
The core warranty has expired, which means if anything goes wrong with the motor, you'll need to throw in another at least 6 grands, just to replace the engine.
(not to scare you, but so you are prepared)

The 2005 is at 86k miles and the warranty expires sometime next year (8 years).
Use your best judgement.

Just my .2 cent.

 

I will say the newer 2006 with the clean title. You will have more time for warranty just in case something goes wrong, specially with the fragile engine of the rx8. Good luck whichever you decide to choose.