Having been a serious collector of archery tackle for over 30 years, I may have a little different perspective than some who collect only select items.
I have seen prices go up and down with the times and with the interest in specific things.
When the Internet boom for online auctions hit, about 10 years ago, prices began to go up dramatically...
I collect 1870s to 1940s wooden bows, 1930s to 1951 Grumley Bows, 1950 to 1966 Bear Kodiaks, 1955 to 1967 Bear Kodiak Specials, 1871-1971 broadheads, 1870s to arrows, Archery books, magazines and catalogs and miscellaneous memorabilia. Many of these prices have remained fairly stable over the times, but others have increased, then dropped.
While many prices have declined over the past few years, some prices have actaully increased in that same period.
For the most part the prices that have declined, are the ones that were over valued to begin with. Anyone with a lot of experience should have been able to recognize those over valued items.
One factor that is seldom taken into consideration is the specific parties who were bidding on these items and driving the prices up. In the past few years, many of the previous well moneyed bidders are no longer involved in the bidding and buying items. Some have actually sold many items.
According to the consumer price Index, $100 in 1979 is the equivalent of $297.48 in 2009. That is nearly tipple in 30 years.
Speaking for myself, in 1979 each $100 I spent wisely on collectible archery items, is worth far more than $297.48 today.
In all fairness, in 1979, I never bought anything in an auction. Winning an auction really isn't winning... Logically it is agreeing to pay more for the item than anyone else...
I have no idea what the prices of archery tackle will be like 30 years from now in 2039. It's not likely that I will be alive then to compare prices to the previous 30 or 60 years.