New Criterion barrel is $269
Receiver is $50
Stock set $100
Bolt $90
Trigger group $100
Gas Cylinder $60
Op Rod $150
Those are retail, you could probably do better on some of those prices.
Scrounge up the rest of the small parts and a Nork M14 rear sight for under $100....
Barrel install and finish ream could be done for some beers....and you have an M1 for under $1000.
Lets drill down on this a bit more. Some of us are buying Garand parts on a fairly regular basis and see prices going nowhere but up. At present you can find a receiver and a Citadel barrel at retail in Canada for $50 and $269 respectively. Add the tax and shipping and that gets you to about $387 for the basics. A few parts do turn up on the EE, but a lot need to be imported with the associated US exchange rate. Here is a list of current prices for parts after US exchange:
Boyds stock set - $145
rear sight assy - $110 (don't use the crappy Norinco M14 parts as they are made of soft steel and that's why Norinco owners swap them out for real Garand parts)
trigger housing assy - $110
gas cyl assy incl front sight, gas cyl lock, stacking swivel and gas plug - $140
op rod and spring - $200
stock metal - $87
receiver internals - $187
bolt assembly - $100
Add this to the $387 for barrel and receiver and that gets you to $1466 without postage on anything but the barrel and receiver. Add the cost of a re-Parkerizing job for everything but the new barrel @ $150.00 and you are now sitting at $1600. Then there is the investment in tooling or gunsmith services to install a barrel and finish ream (most folks don't do this work for beer).