I have 2 of last years Cavalry Arms SEBR lowers. Both are complete and ready for an upper. The black one is unfired and the green one has 30 rounds fired from it. Decided I don't need three of them!
Black one is AR15.COM SEBR-034 TRADED
Green one is AR15.COM SEBR-176
265/ea $ 245/ea $235
shipped anywhere in the US (including AK and HI)
or $500 $ 480 $465 shipped if you take them both.
I can send pics if you really need em but they are the standard MKII version.
ETA: Pics up!