Blackjack
Please see my response on your other topic.
For this question... I'm not sure on "retail" price but below is listed "dealer" price on a few .308 rifles...
Rem 700 Varmint Lam Stock (VLS) - $490
Rem 700 Varmint Synthetic Stainess Fluted (VS SF) - $666
Rem 700 Varmint Synthetic (VS) - $550
If you know someone with a FFL you probably can get one for slightly over that.
I forgot how may rounds my rifle is gauranteed to hold for but I do remember it is well into the thousands. I'll look it up and let you know. 500 rounds is just getting the barrel broke in IMO... that is if it is done right. On the other hand if done wrong....
As for stocks for a precision rifle first choice would be a composite with bedding block or pillers, next would be a laninate with the same, then last one of wood.
Please keep in mind that there is A LOT more to a precision rifle then just a heavy barrel. It is down to a science now. Trueing the action, barrel, locking lugs, race ways, heavy recoil lug, bedding the action to the stock, etc, etc, etc. That is why you can see complete "precision" rifles costing upward of $2K (w/o scope).