Re: Cheaper to build?
I have built several rifles using Rem 700's in SA & LA in the past few years. I do a lot of cost calculating ever time I build one & for me it has always came out pretty close price wise when all said & done.
It is always a hell of a lot quicker/easier to just go down & buy a donor rifle rather than do a little searching for a Rem700 action (unless of course you already have the action laying around). The last 10 or so Rem 700 bare actions I have seen up for sale have gone for $300-$450 varying based on age, CM/SS, condition, bolt face, etc, etc. I can go pick up a brand new in the box Rem700 SPS in several different bolt faces for $400 plus tax & sometimes even a few $'s less with the possibility of rebate offers, etc.
To keep this post short I will just say that it is up to you to figure out which starting point you want to go with but weigh your options based on preference. I personally like to start with a NIB as I know it has no round count, no abuse, no exposure to chemicals, etc, etc & I like to start with a clean unmarked bolt face to true from. Before the recession really kicked in I actually picked up a couple of Rem SPS SA's to build from & after selling off the stocks, triggers & barrels the actions were damn near free. This was the rare exception as they were on a killer deal & I wish I would have procured more but oh well.
Enjoy & have fun with your build.