Coin Store Etiquette -Wwyd?

I would buy it from the dealer and then loudly exclaim " holy cow, look at this " and see what his reaction would be.

As a small time antique dealer I guess I look at it somewhat differently. I buy items in my area of expertise all the time that other dealers have not priced high enough.....& know for a fact that I underprice items outside of my specialty.

I talk with other dealers about "scores" we have made at local antique malls on a regular basis. I once had a dealer brag to me about an item he bought for $12 that sold for over $400 on ebay. Turns out it was my item he scored on. I was under the impression the item was a replica; he knew enough about it to know it was the real deal.

If it was a minimal difference I would probably buy it and not think too much about it, but if it was a decent difference (even something as little as $10 difference) I would mention it. Partially because it is the good and honest thing to do (karma) and partially because I know I would have that "I want to buy this coin but I look really guilty of something" look on my face as I tried to pay for it. Also, I think it depends on the dealer. I have 2 dealers at coin shops and shows that I really like and I am always looking to buy from them first. They are honest, have decent prices (not always the cheapest, but fair), and they are very helpful and overall good guys. I would never buy anything that I thought was mismarked without mentioning it first. As a matter of fact I did that once for a coin that was marked wrong by about $17 and he ended up giving it to me at the cheaper price because he appreciated the honesty. On the other hand, if the coin dealer was a real tool or a grumpy old man then I might think a little harder about mentioning the mistake to them...

I'm really torn on this subject, though I'd like to think I'd point out the mistake.
We are fortunate to have several coin dealers in the local area and some I considered my friends and others, well I don't often darken their door. Recently my friendly dealers looked at my collection of Liberty nickels. The collection doesn't have the main key dates (1885,1886)but consists of the rest in VG to F or better condition, including the 1912s. Since my Dansco has two pages, I filled up the second page with nickels of G condition, though some are of higher grade. Again, no key dates, 1885, 1886, or 1912s. The book has 63 nickels, which includes a Racketeer nickel and several spares.
I feel my friendly dealers really lowballed me on the set. One said he had to eat too, but my thought is he must eat higher off the hog than I do! I was hoping to get at least half of what I had into the set, but offers were less than a quarter of that and less than what I gleamed from the Blue book. I don't really need the money, so I'm holding onto the set but questioning my investment. We are in the middle of moving to a new place and the extra bucks would have helped out.
Sorry to be so negative, but questioning if I should buy the key coins from these guys. If I found a 1885 or 1886 in their junkbox, I still hope I would call it to their attention. At least I could still look at myself in the mirror.

I would say that at the end of the day, it is the seller's responsibility to price his merchandise accurately.

How many of you have hit a smokin' deal on a BIN on ebay and when you've gone to pay, sent the extra money to bring it up to full price?

I have a good relationship two dealers and would honestly probably tell them if they had something underpriced. The other two that I deal with, probably not.

Agree with the seller responsibility 100% but at the same time I have pointed out mistakes to dealers that I have a good relationship with and it always pays off in the long run.

I have a great relation with my coin dealer. Recently, I found a Canadian dollar in the 25 cent bin. I alerted the guy. He said thank you very much, and then let me take any other coin from that bin for free!