Belated "Hi!" Luis - and a happy new year!
Nice G-Lide, I have similar but transparent purple. Seems like the dollar/GBP divide is still there - when I was involved with cameras it was a rule that a $100 piece of kit Stateside was £100 (plus VAT) in the UK. Same with G-Shocks
Have you been down to the ocean yet just to check that the tide is behaving as the watch says it should? Easy for me, I live on a small island with a bridge to the mainland so see the sea each day. Word of warning - I started with one expensive (to me) G-Shock,bought another as a daily driver and 53 watches later ...
Philosophy for some of us seems to be "always have at least one watch in the post", the only way to cut down is to buy things from a long distance so the post takes longer to reach us. Good luck with your hunting, if you need any advice start a thread in here or PM one of us - if you ask three people you will probably get at least three opinions.