Modified GMT II To Buy or Not To Buy....

[unclesallie]

Today I was at an AD killing one hour whilst in Timonium, Maryland, and saw a TT Black Face GMT, used, which they told me was 1970's vintage. Hmm. Price? very cheap.Trade on my white face DJ: excellent value. My interest was really peaked. Why such a good trade? Why such a low price? Then I started looking carefully and asking a bunch of questions: how could this serial number be in the 8 million range and be a 1970's watch?(of course, this I had to check just now, online). Not possible. Then I noticed the crystal was sapphire..... Then, the salesperson, took the watch back and they told me: 1. crystal replaced. 2. bezel replaced. 3. submariner bracelet replaced original. The watch looks great, BUT I'm thinking its resale value is significantly impaired by the changes. Am I correct? I'm also thinking they're wrong on saying it's a 1970's vintage, has to be 10 years newer.....

All input welcomed. This is a very large AD, so I'm quite certain they're not trying to cheat me or misrepresent in any way........