assistance / advice please

[Walmart]

Hello all,

I'm at a crossroads in the world of watches. I bought a submariner approx 8 years ago, still looks beautiful and seems to have increased in value (which is a nice added bonus!). last year I bought a Pam359 which as the sub looks lovely and seems an icrease in value is on the cards. My next purchase I would like is the Daytona...only problem non available at AD's over here in England. I'm nervous with ebay as I'm no watch expert and even if everythings looks fine, I'd end up buying the best fake ever! So now i'm looking at the Panerai submersible range.. Any thoughts fellers (and possible ladies of course!)