Starting a thread and providing a link to the auction in it, on an Amiga forum site that has hundreds of members that read it every day, also makes it very easy to bump up the number of people who visit the auction and probably gives you an unrealistic expectation of how many watchers are actually interested in putting in a bid.
From experience with several Amiga related auctions, it seems to depend on the specific Amiga item, and typically if a listing attracts a number of watchers early in the listing period, there is a higher percentage of those watchers who actually end up bidding at or near the end of the auction.
At this point, if even a small percentage bids there will be some competition and since there have been bids, the item will sell no matter what.
...those who start watching near the very end seem more interested in just seeing what it went for.