Either im stupid or you dont read what im talking about..
I have a USB->serial adapter and I have tried several usb-mices... My question was if I can get a PS/2 mouse with a ps/2 ->usb adapter ...
What in the hell will I need a usb -> ps/2 adapter for?? lol
Not every USB mouse is capable of supporting legacy PS2 interface.
You don't need the adapter, you need a mouse that is COMPATIBLE with that adapter. One way to insure that the mouse is compatible with the PS2 protocol is to simply buy one that comes with the adapter. Also, whoever made this adapter probably tested it with name brand mouse like Logitech or Microsoft.
I have this same mouse which I use with my Minimig, so I know that one will most likely work, and its a nice mouse for the money.
Anyway, you can continue to plug every USB china mouse into your ebay brand mouse adapter and your vintage Amiga with the hopes of finding one that is compatible, but keep in mind that you may also damage the adapter and/or the Amiga. I hope your Amiga is a model with replaceable CIAs...