What supplies I needed (right away) - some I had, some I had to order!
Depilling device: removes pilling (those little beads of fabric that appear on worn fabric)
Sewing kit: problems like a loose butto, perhaps, easily solved with a quick sew kit
Tide-to-go pen / Stain remover: for removing wee little stains (if they are removable)
Tape measures: prefer having multiple in non-white colors so they "pop"
Backdrop(s): this one I'll say is for sure optional slash where you can get creative. I've seen people use everything from posterboards from dollar tree, tapestries, rugs, wooden floors or tables, to professional photography backdrops; the point here being that consistency with your backdrop is key from the start to create a branded feel for your customer even early on! When I first began, I used the wooden floor in my living room in the same spot each time to keep it consistent. As I explored other options, I've come to settle upon a mix of 2 backdrops - in plain white + white brick.
Bins: those plastic tote bins from walmart/target/amazon - to store clothing in, a great affordable option for early inventory storage which can be scalable as you grow!
Advanced items (for later on) might include a dress form, a lighting kit setup, and camera or photo editing software. I feel these help me a great deal, but were worth saving up/waiting for since I couldn't splurge on everything at once.
How I could learn more about reselling specifically on my own time:
I am a huge proponent of learning through trial and error and your own research, but what if you really don't know where to start? I suggest joining communities of resellers + sellers - especially on instagram and youtube. Find your people! Don't ask them for the answers, but see how they make the journey. For example, I follow a girl on Instagram who recently started trying out modeling her own clothes (she's awesome and so are the clothes), which inspires me to consider how to show my inventory best for photos. Its not about copying, but about learning others' perspectives and methods for operating! They are probably different from yours. Also, I've seen others from the Instagram #resellercommunity discuss different sales methods, new features, different sales platforms, and more. You truly get the best sense of how to progress on your own, in your own way, by looking for inspiration from other stellar sellers!
How I should price items and the reasons why
how to check past sold prices (on poshmark in particular): see above photos - after searching for your item in the search box, under availability mark "sold" to filter out the available items. you'll be left with the sold listings and the prices at which they sold.
how to justify your average cost paid per item (this will vary person to person, and state to state even). find what works for you as a low cost of inventory, because the lower your cost, the higher your profits.
How different platforms (i.e. Poshmark versus Ebay versus Mercari etc.) attract different consumers: this one is learned through trial and error AND doing your research!! Check the past sold prices for items you are considering buying when sourcing (shopping for the store), and consider whether the "customer" you want will primarily be a shopper on poshmark, ebay, mercari, or another sales platform. That being said, if your customer doesn't like to shop that brand in your store, then consider trying an alternative platform for selling that brand or style item.
How much of the time it accurately takes to take up reselling as a side hustle or a main hustle: I personally thought it would take more time to find inventory and way less time to photograph, measure, clean, and describe items for listings on Poshmark. I was wrong on both points. Time taken will vary based on your personal goals + efficiency, which will get quicker over time. Why? Because you learn the most efficient uses of time when sourcing, photographing, measuring, and more. You learn that your time is both finite + valuable, and needs to be treated as such.
How to take time to view your store from an alternative viewpoint or perspective, such as from the eye of your customer - (if you can't, you can have some really awesome friends do this for you): Pretend you're a shopper on poshmark. Even better? Be a shopper on Poshmark! Even if its just once. Go through the motions the way your customers will have to, and use your shopping experience to judge what customers may need or want out of your store's experience. If you've tried this and can't separate yourself from your work well, try having a really honest (and kind) friend to try shopping your page and allow them to suggest what would facilitate their shopping process in your shop.