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Lot of (10) PS/2 to USB adapters for Keyboard & Mouse, let you use your old IBM!"
New, lot of 10, $8.99 + 4.99 shipping
I realize opinions aren't unanimous about these. Some people prefer the Blue Cube, and other types.
Personally, though, I've used many of these through the years—with Model M's in particular—and they've all worked flawlessly. (The mouse connectors are optional.) They seem to be, by far, the least expensive way to go from PS/2 to USB.
I don't know how many of you
need multiple converters; most of us can get by with just one or two. But as some of you restore and resell Model M's (and other PS/2 boards), it occurred to me that this might be the easiest way to make them USB-ready for others. It's your choice, as always... Cheers!