As always, it depends. Here are some relatively easy answers.
For any item, both its functional and cosmetic condition will affect its value. Most Argus products are pretty common, so values aren't particularly high. You can check this site for uncommon-to-rare items
that might have a better chance of selling.
If you know the model name or number of the item, you can check eBay, by searching for it on their site -- in the 'Advanced Search' options, check 'Completed Listings'. 'Completed Listings' are sales that have ended, whether or not the item sold. If the price is shown in green, it sold; if it's black, it didn't sell. See what percentage actually sold and prices achieved to get an idea of current market. Checking the items that are currently for sale won't help as much, except to see how many are on the market today -- asking prices aren't always reached.
Working 35mm and 620/120 film cameras are becoming popular again, so Arguses that fit that description may be easier to sell. Working Argus digital cameras of 6 MP resolution or higher may have some appeal -- as of 2023, vintage digital cameras are kind of a retro trend among young people.
If it's a slide projector or a movie projector, it has basically no value unless it is fully working, ESPECIALLY its light bulb. The bulbs are hard to find and expensive to replace. Both shipping costs and repair costs for any projector are usually more than the projector is worth, even working. Best case is trying to sell it locally, but don't expect to get much money for it even if working.
