Well, the guy wanted $8 each, $7.50 for 2 or more, and rolls of 20 for $7 each. He said I could take the lot for $6.50. I just didn't have that much cash available at the time.
I'd been getting small amounts of silver eagles and maples from APMEX's store front in Edmond. But a couple months ago they informed me that they were in the process of separating from APMEX as the mail order division moves to a more secure location in downtown OKC. Thus the selection was suddenly nowhere near as good. Also they blatantly overcharged me by a dollar beyond the quoted price. (By the way, APMEX online now lists $150 + shipping + OK tax for a roll of 20 average circulated silver halves.)
In total dollars per ounce of silver - ignoring any coin-specific collectible value - the halves came out similar to what I'd been paying APMEX for the eagles. (Sales tax adds up fast.)
So I overpaid by the value of a bag of Doritos. I'm not going to cry and lose sleep. Just wanted to know what's normal. I'll look for other local coin dealers for comparison. Or I could try some negotiation with that guy as a friendly repeat customer...