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I shot the Warbird for a couple of years since it was the big dog on the block when first released. It was certainly fun to shoot especially on the desert where I could stretch its legs. But all things change and we were able to get better cartridges, powder and bullets soon after this cartridge.
It was the action which was the desirable component in the first place. Even when buying a complete rifle, it was still economical to buy the rifle and strip off the receiver to use for a Lapua build since Lapua builds were few and far between.
In your situation as you've described, the barrel will be questionable no matter what the seller uses as a description. Most don't have the vaguest idea of what you might be asking about as far as the quality of the internal finish is concerned. But, given that you will be stuck with buying brass, powder, bullets and dies just to make sure the original can shoot up to your expectations, I would assume (?) it will be nearly finished of finished.
The scope is no longer available and was second tier quality-wise anyway. It's still usable just not up to the quality we find nowadays.
Personally, I would buy the rifle with the expectations of removing the action to use for a build better suited to your needs and budget. Most Lapua-size actions are $1,000 or more anyway so you're winning to a small extent. You still have the stock and bottom metal to consider for use also.
Enjoy!