I am considering a Barrett 20" barrel .50 cal.   Where you guys buying from and who has the best prices?   I dont see too much of a price differ, so im leaning towards the 107.  
I would even consider used, but dont see too many listed.  

thanks..

I am in a similar boat. I bough an M99 and keep looking at m82s waiting for a deal.  Prepare Gun shop was selling there last batch for 7K OTD but they are back up to 7.5K on website now. I should have bought one at 7k.

I bought a 29" 82A1 last month for $7k including shipping and transfer fee.  The 107's were substantially more, anywhere from $2-$4k depending on where you were looking.

M107's are definitely more, either you are getting an M82 for a high price or a M107 for a low price compared to market, and if you can get an M107 for as cheap as a M82, you'd be crazy not to go for it.  

I bought an M82 last year after a lot of research and contemplating whether to spend the extra $ on the M107, and I'm extremely satisfied with the M82.  Unless a suppressor is an absolute must and the slight weight difference is a really big deal to you, go with the M82.  All the fun for thousands less, and more cash to spend on optics.  I ended up buying a BORS with the money I saved.  

And with that being said, best of luck with your search and purchase.  There's nothing more satisfying than hitting a gong at 1000 yards with an .50BMG.  

I got an 82 from Buds Gun shop for 6674 shipped. If you're diligent, you'll find them. I found out you could use the price match request on Buds site and could get them for 6744......
If you're serious