You have a beautiful example of a fine custom build rifle in a niche caliber. It has about all the bells and whistles popular through the 70s, before the bottom dropped out of the market for blue metal and fine wood.
No doubt the rifle was most likely made to someone's order, and was done by people who were masters at what they did.
The stock is done in Weatherby style, but not a direct line for line copy. The wood to metal fit is outstanding. It's magnaported, a nice touch. Good peep sight, commercial "side safety trigger, about the only thing left off was some kind of express sight on the barrel. Wonderful work.
Unfortunately on today's market, its probably not worth what it cost to build it.
Not in terms of $ but in terms of $value.
The caliber works against its appeal to most outside of a very small subset of collectors and hunter/shooters. That kind of rifle and the work that went into it was several hundred dollars back when gas was $0.60 a gallon, for premium!!
I have no idea the market value of it, today, but the market is different from what it was when that rifle was made up. Today, it's stainless and synthetic that sells, and the lower the price, the better, it seems.
You would probably get the best price at auction, and I mean by a reputable firearms auction house, not Gunbroker, open to every cheapskate in the world. Gunbroker will sell it, but what it will go for, I can't say.
Good luck.