The price of 91/30s is fairly stable nationwide, but M44s and M38s in particular vary a lot by region from what I can tell. M38s are generally less common than M44s, so they typically command a small premium.
$160 for an M44 and $190-200 for an M38 are pretty typical prices in my area, though I've seen them priced higher as well. I did see an M38 for $125 not long ago, but the stock had a pretty bad split in it and the bore had pretty heavy pitting, so I passed on it.
Gun shows are hit or miss. The huge variance in pricing is interesting to me in and of itself. One table will have NIB 2.25" Ruger SP101s for $415, while one directly across the aisle will have the exact same gun for $550.
But you do luck out now and then, so patience is most certainly a virtue. The other day I found a nice 2.5" S&W Model 66-1 .357 Magnum, pinned and recessed, for $430. FYI, those P&R'd S&W short barrel K Frame Magnums bring mid to high $500s or even lows $600s, in most places these days.