there was a long article on the Marlin Model 90 in one of the "Gun Digests" too. I'll look to see if I have it.
On cost/value I can help not at all. Except to note that I have been astonished/appalled at the ASKING prices of ALL double .410s (and some singles, pumps, and bolts....) that I have noticed on the InterNut recently! Including late model birch-stocked .410 Stevens 311s, IMO the worst insult to doublegun aesthetics ever spawned (late "Fox" Model BSEs come a close second in this ratrace!).
