As I said, it depend entirely on the products in question as well as the market. Aluminum is valuable enough to more than pay for salvaging costs for most products that contain a meaningful amount.

Glass meanwhile is currently not cost-effective because the value of salvaged glass has recently fallen below the salvaging cost, even though glass recycling was quite cost-effective in the past. The market is just as important as anything else here.

Solar panels are not cost effective at all to salvage as their components are not particularly valuable but are quite costly to salvage from the panels. Thus they are piling up in landfills wherever there are no regulations that require proper recycling.