Traction tires. Where do you guys find them?

Looking over the list that Super linked I concur on the prices, you can end up paying up to 400-500 yen buying them straight from a store in Japan, so $1-2 of markup is fair.

Edit: Also if you have Prime this may be interesting, $6 at the time of writing, with even cheaper non prime options: https://www.amazon.com/Plarail-Repair-Pa...B000LXS8IM