Under $15:
Sierra Elegant Beauty ballpoint
Perfect Fit Ti Gold ballpoint
Triton Chrome/Gold roller ball
Presimo chrome /brushed aluminum RB/FP
Presimo Chrome/ sculpted aluminum RB/FP
As a note, when the Presimo was introduced, it had huge problems. But PSI has done a very nice job with the fix on this pen (in fact, a little too good of a job. It's now difficult to remove the clip and cap liner for customization). This set looks quite impressive and sells very well for me.