https://buyee.jp/item/yahoo/auction/n251131744I had my eye on that one too. Was a bit too rich for my blood. I will still be on the look out for a Working 357 for Tekken 6, as its the only Tekken game other than 7 that I don't have arcade hardware for.
Please let us know how it turns out for you, I would be interested in hearing how well it worked.