$30 sram  x.9 shifter 10 speed exact actuation, great condition, very crisp shifts, also very easy to do cable swaps.
$30 sram PG1050 10 Speed Cassette, 11-36,  1-year old light use, 100miles
$10 sram SRAM PC-1051 10 speed chain, same age/miles as cassette above.
$0 free  sram x.0 10 speed rear derailleur, works but has cracked long cage
$0 free extra kmc 10 speed missing link (if you buy the system above)

x.9, x9, x.0, x0, 10sp, 10-speed, 10speed