What kind of help would you like? If pricing I use heritage and then looked at graded closed auctions on ebay. Then there are a few dealers I also look at. Then with the right eye appeal I might go a few bucks more. Then again this is a process I use, but not for walkers.
You could go to Heratige , find a Walker in the date and Grade you're looking , they will list several price giides but more important the price the coin brought in the most recent auctions . go to Ha.com . rzage
Well, like mark and rzage said, check out the Heritage website. Thats where I usually go to see what coins have been selling for. But, right off the top of my head, I'd say a 38-D would be somewhere in the neighborhood of $120 in Fine.
I bought one of these a few days ago on the bay, $89 was the final bid and it's a solid F-12. Saw several for sale at the show today, again, could have bought them for around $100 It's a good coin to have, a key for Walkers, if it's nice, hold on to it.