If you want good FKM rubber straps then look into Juelong stores in Aliexpress. $5-10 for fkm straps which are usually rebranded and sold for higher price. I have quite a few tropic and waffle straps which have been very comfortable and held up well.

For real and good quality leather straps under $50, check on ETSY. @sagebrush is right about the quality of leather you get from Vietnamese sellers and most will be happy to customise the strap for you based on your preferences and odd lug widths. My personal favourite seller is Harpyleather.

If you want a chronograph for around $600 then look into Seiko Speedtimer models. 39mm and 41mm models are available plus quite a few color options to choose from the lineup. At that pricepoint it's hard to find a different brand with good finishing and size options. Citizen chronos are available but those are usually on the larger side.

Or if you want a conversation starter then the new Speectimer SFJ series.

Or the budget option is Orient Mako chronograph

And if you want something automatic and just a 3-hander then lot of options to choose from Seiko for under $600. Citizen has a few good models too at the same price range. Hamilton khaki field and maybe Tissot Gentleman (slightly more than 600 but you get good deals during holiday season) if you want to go Swiss.

The King turtle is built like a tank. A proper unit and you can feel the quality on the wrist plus the turtle cases are comfortable. Great beater watch with good specs and also you can get these variants for under $500 sometimes during sales. Apart from the candy bar, I can't say anything bad about this model. Also, quite a few colour options are available.

The Ginza is just unique and can't be replaced unless Seiko wakes up and decides another Ginza edition in different color. And that will sell ridiculously fast considering the demand.

In the current collection, the Mystic forest is the only variant that captures somewhat of a unique dial.

You bought a Kamasu ver 2.

650 TPD

JDM websites usually have good deals for around $550-600 but you have to also consider the duty and taxes you might incur to pay when you ship the watch. Adding all and if it comes to about the same price in your location then it is pointless. Go to a Seiko boutique and you may get a discount which may be a better deal compared to shipping from another country.

Or if you travel then try to pick up from the said location.