Vintage 1994 Dell Lexmark Model M 1369050 PS/2 101 key clicky keyboard, testedEnding tonight (6:13 pm) and no one's bid on it, possibly because it superficially resembles the later, far more common rubber-dome Dell AT101W:
Make no mistake, though—this 1369050 is a genuine buckling-spring Model M, essentially identical to IBM Model M's of the same period. And it's still at its opening price of $19.94 + 15.87 U.S. shipping, so this may be a chance to grab one cheap.
The cord's a bit stretched, but most of them get that way eventually. The owner has cleaned (short of opening the case) and tested it, which many sellers don't bother to do.