Omega Seamaster cal.471 from 1957

Hi!
So I found this watch on ebay and since I've never bought a vintage watch I'd like to have other opinions on this:

http://www.ebay.fr/itm/141540559631?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

The seller says everything is original (except the strap which isn't sold with the watch). Here's what I gathered:
- I checked the caseback number on the vintage omega database and everything seems to be ok: http://www.omegawatches.com/planet-omega/heritage/vintage-watches-database?ref=15248
- The outside of the caseback seems pretty clean for a 50+ years old watch
- The dial also looks really clean compared to the hands, crystal and case
- I don't see anything outrageously wrong on the dial, although the logo and the OMEGA look slightly unaligned but maybe I'm just paranoid

Thanks in advance!

Thanks for the insight!
You're probably right about waiting for a better watch. I'm just really hyped about finding a watch that I like in decent conditions. I'll just monitor it and see how I feel about it right before the auction ends. I probably wouldn't pay more that 170-180€ for it, but my budget for a first vintage watch is 200-250€ so I'm not sure I can get a significantly better condition for this price.
Also one more thing I noticed on the dial: at 3 o'clock the "3" is not aligned with the marker

Hands look a bit ratty as well with minute and second hands looking too long. I don' know this reference that well but I question their originality. I'd want confirmation they were/weren't original before purchase.