Hi, I have an opportunity to buy a very gently use Beretta 92FS Vertec. It has the black bruniton finish. Made in 2004, comes with original case. Unsure of number of mags. It is being offered at $500. I have a 92A1 and I'm intrigued by the flat back and thinner grip on the Vertec. Is $500 a decent deal? Is there any future collectability in the Vertec line?