Well…
Would I feel comfortable being into this one for around 4k? No, but that's just me. Now, I purchased several Triple Lock revolvers circa 2015 to 2020, simply because I like them, they are of superior craftsmanship, and they were great value for the money. These were manufactured 1907 to 1915 and in the 2015 to 2020 time frame I observed that a comparable firearm from 1907 to 1915–that is, a competitor—would be the Colt Single Action Army revolver. A Colt Single Action Army revolver would have, if in similar condition, a much higher price tag, or if the price tag was similar to a Triple Lock revolver, it would have zero finish, or be refinished, etc. Plus there's the Target Model variation, of which a similar revolver was not available from Colt during that time frame. A Target Model Triple Lock revolver with finish was available for a fraction of the cost of a Colt Single Action Army revolver.
In hindsight, I now believe that this time frame was one in which Triple Lock revolvers were radically underpriced relative to other similar revolvers. In essence, I got them at a bargain price.
During that same time frame, Registered Magnum revolvers were increasing significantly month after month, year after year, sometimes even 20% a year, or more, for nice examples. Triple Lock revolvers remained stagnant during that same time frame.
Now, Triple Lock revolvers and Registered Magnum revolvers appear to be "even par". For example, over in the Classified section of this forum, a forum member has a very nice Registered Magnum revolver he wishes to trade for a Triple Lock Target Model revolver. Such a trade would have been unheard of only just a few years ago. In fact, if I were the OP, I would be inclined to execute such a trade, if both parties could come to an agreement.
So, for me, paying such a price would be a tough pill to swallow. But I was likely spoiled, and others may have a different perspective. But, now, my Triple Lock acquisitions have been greatly reduced. I have only purchased one in the last couple of years. This is it:
http://smith-wessonforum.com/s-w-ha...ped-1911-mucklow-sulfur-co.html#post141414843
I purchased it earlier this year. It was $4500 shipped, and with the $15 FFL fee, I'm into it $4515. Some might say I paid too much, but just like with the OP, I wanted it, and it filled a "hole" in my collection, I simply lacked a blued Triple Lock revolver with a 4" barrel. This one was a long time in coming. I took a gamble, as the seller's photographs weren't terrific, and it's much better than I expected. In short, I'm thrilled to death to be its current caretaker!
With regards to the OPs revolver, the bidding history looks legitimate, it appears that several bidders were in contention for this revolver up until the end at not far off from the final sales price. I don't think a shill bidder was involved, which tells me that several others believed this one to be worth slightly south of, or at, the 4k mark. If one adds in sales tax, the total cost in many jurisdictions would cause this revolver to easily surpass the 4k mark. In fact, the sales tax figured in May be why the OP was the successful bidder. IIRC, he is from Oregon, which has no sales tax. His competitors may also have wanted to be into this one, all inclusively, for under 4k as well. Not having to pay sales tax allowed for the OP to place a more competitive bid, in the end.
What the OP does have is a revolver he can shoot regularly, with no concern as to seriously degrading the condition. Shoot it on a hot July afternoon with sweaty hands, don't bother wiping it down until the evening. Not a problem.
My comment with regards to the stocks relates to the fact that, at least in the Gunbroker ad, I didn't think they fit particularly well, edges a little soft maybe from sanding. I now think that the OPs photographs suggest that this is likely not the case. I do think that a coat or two of boiled linseed oil or rung oil may have been applied to these stocks at some point.
As they have the correct, for the era, non medallion stocks, and these are infinitely less common than the medallion ones, it's unlikely that these stocks are not original to your revolver. It may be the penciled in serial number on the inside of the RIGHT stock has faded with time. Or perhaps it's very faint. Try several photographs of the inside of the right stock under various light conditions, enlarge the photographs, and a faint serial number might become evident.