Pros:
- Confirm 100% original.
- Confirm retail price.
- Local warranty. Anything wrong with your watch, just send it back to any G-Factory or even Marco Corporation, the distibutor.
- The box is the actual box for the watch. G-Factory keeps the hang tag for their records though.

Cons:
- Only basic models. Special models (like the 30th anniversary ones) will only be sold at a raffle system. Don't even expect them to have the slightly special/rare ones.

Watch shops other than G-Factory
Pros:
- They carry some special/rare models.
- Price negotiable.

Cons:
- Elevated prices. Even if they give you up to 40% discounts, sometimes, it is still more expensive than retail.
- Their stocks come from various sources. Sometimes from the official distributor (Marco), sometimes parallel imports.
- Warranty wise, send it back to them and they'll try to fix it themselves (I've seen it before).
- Watch wise, you will most probably get a different box from the original one. They mix up all their boxes.

Online Sellers like the ones in Lowyat Forums, Mudah, Lelong, eBay
Pros:
- They will have any model you want, even the super rare ones. You name it, they'll have it
- Boxes, hang tags, sometimes even the protective plastic is still intact.

Cons:
- The usual online trading risks.
- Elevated prices, especially for limited/special/rare models.
- Authenticity not guaranteed. I've not encountered this but you have the risk of getting a non-original one.
- It might not be new, but labelled as new.

Cardboard

These are the most normal ones. Basic and smaller models comes with these boxes.

Tin boxes
These are normal ones too. They come in mainly 2 different shapes, hexagon and round. They come in different colours as well (gold, black, grey, black with coloured spots).
They are usually for bigger watches that can't fit into the smaller cardboard boxes.



Collaboration and special edition boxes
These boxes are an art by itself. The anniversary ones (20th, 25th, 30th) are designed by Eric Haze. Then collaboration companies also design their own motifs. For example CLOT's black tin box with logo and dragon.


Some collaboration models uses the cardboard box.


Some companies even go the extra mile, like CLOT's transparent acrylic boxes, TURBOKOLOR's paint tins.



Trunk Cases
These are usually JDM models. Most of them are only for sale in Japan. They have customized designs as well.

Pertama Complex and Sogo used to be THE place for G-Shocks last time. I've not been there for ages so I'm not too sure. I've heard that plenty of shops sell fake ones also.

DW-8200 is not the first generation Frogman. The first one is DW-6300, where there isn't even "Frogman" on the bezel. The DW-8200 bezel is still so widely available is because Casio kept producing this model for a long time. Even when the module is outdated, they updated it with the GF-8250 that looks exactly like the DW-8200, only with a more advanced module.

The newest Frogman is the GW/GWF-1000 Frogmans but the GF-8250 co-exists with these new Frogmans, which is why its bezel is still widely available.

This is the DW-6300-1A "Frogman".


These are the five generations of Frogmans.