Boyds stock for $99, Shilen trigger for ~$100. After that, it becomes a question of how bad the barrel is. My 223 barrel in an SPS was fine - accuracy wise, but it was a 1:12 so I ultimately had to sell it to get something that could shoot heavier bullets. My 8x57 in a Classic was not. Rebarreling is quite expensive and it might take 6 months or more depending on the smith, blank availability etc.
CBI and McGowan do Savage style barrel prefits that attach with a nut and can save you a lot of time and money waiting on gunsmithing. But the question is how long it will take to get your barrel ? I know that Mc Gowan advertised them many months before they actually started making them.