I find it wise to draw your affiliates' attention to the garage sale option first. Most people pile up unnecessary and even unused things, just because they have no idea what to do with them, or simply put them aside and forget they have them. They just need to be reminded. Once they start selling their stuff, chances are that they will also take a look at other people's lists and probably notice something they would like to have themselves, then maybe get some new ideas about what they could sell, and so on, and so on.
Also, it is of utmost importance not to be pushy! If you are too pushy, people will just ignore you or even believe that you just want to trick them. Do you enjoy shopping when a sales-person keeps asking you what you're looking for, offering her/his help excessively and following you around the store? I don't! Actually, that usually drives me out of the store! It's good to ask yourself how you would feel in another person's shoes, and approach people exactly as you would like others to approach you.
You may discretely draw their attention to some specific items which you yourself find useful, appealing and affordable. But, again, don't do it too often and don't ask for feedback.
I find it wise to draw your affiliates' attention to the garage sale option first. Most people pile up unnecessary and even unused things, just because they have no idea what to do with them, or simply put them aside and forget they have them. They just need to be reminded. Once they start selling their stuff, chances are that they will also take a look at other people's lists and probably notice something they would like to have themselves, then maybe get some new ideas about what they could sell, ...more