How Much To Pay For AU Mercury Dimes

Just off the top of my head : $4-5 for common dates. and up to $20 for better dates and mints.
just tell him to buy a Coins Magazine or check e-bay for prices.

Check Numismedia for the price ranges. En tire half set of all AU 34-45 w/ all mm's including a micro "s" but not including any 42/1 over-dates will be approx. a $300 - $400 set.

There is a guy on ebay who sells a few a month in a capital plastics holder using the same standard photo pic which leads me to believe he has mostly high AU/Low BU, no micro "s" and he seems to get about $450 on avg. auction. Here are his, you'll notice he uses the same pics each time. I would have to think they're an avg. grade of AU58 to MS62:

ebay item number:361428363210 - sold $433

ebay item number:201464448381 - sold $408

ebay item number:201470040513 - current bid $365

If they were all CH BU, so figure an avg. grade of MS64/65 with a few MS66 in there, you would fare in the $600 range for a complete half set like this. The challenge is in the time it takes to put one of these together properly.

34-36 S and D mint mark dates are around $5-8 or little more, 34 - 36 P, 37 - 45 in AU can cost $3-5 depending on quality. A lot has been cleaned or dipped, so watch out for original luster. The lots I bought on ebay comes mixed surfaces, but I been buying less lately.