It's all relative, but it's less expensive than even buying a new Pedersoli Rolling Block, unless you pay someone to do every step. I found Gunstocks Inc. to be the least expensive source for stock sets at under $100 for pretty decent walnut. He has better for more, but not necessary unless you want prettier.
Barrels are about $280 from Green Mountain, but for $200 you can get a BRC barrel that's a little more accurate. It will cost about $150 to have a barrel fitted to the frame. Rust bluing and color case will usually run me about $225-$250, but some places will charge as high as $500 for rust bluing the barrel and CCH the receiver. Sights are all over the place, depending on what you buy. But I don't count that since I'd buy sights no matter what I purchased.
So for under $300 for a donor gun, and another less than $600 I can have one ready to go, except for sights. And it will be exactly how I want it, vs. whatever I can find at $1300 or more.