Well, I can get a Spikes stripped lower for $75, Spikes lower parts kit for $55, and a complete Magpul 6 position collapsible buttstock kit for $70.
Plus FFL transfer $25
and shipping $12
So it looks like you'd save about $2 buying it yourself if you can get the same discounts I can.
Looks like a pretty good deal to me.
I have a Spikes lower that I really like, and just put a Spikes lower parts kit in a Aero Precision lower. I also like their LPKs, a couple small details that make it easier to put together.