They look legitimate and seem to have been in business for quite a while. There is another used car dealer
in the exact location, Shah Motors (シャー モータース).
I assume Sikander and Sha Motors are the same outfit:
[TABLE=full]
[TR]
[TD]法人番号[/TD]
[TD]2200002024553[/TD]
[/TR]
[TR]
[TD]法人名[/TD]
[TD]有限会社シャーモータース[/TD]
[/TR]
[TR]
[TD]住所/地図[/TD]
[TD]〒508-0101
岐阜県中津川市苗木4933番地の3丸市ペナント6[/TD]
[/TR]
[/TABLE]
So legitimate? Most likely. Trustworthy? Only former customers could tell.