Vinted
For each category the small/medium/large postage options do vary on their specifics.
They give rough suggestions, but you can see the specific size/weight limits if you click “see sizing and compensation details”
e.g. in clothing the general s/m/l relate to 500 grams, 1kg, 2kg - but the physical size limit can vary between carrier choices - so make sure your item will be within the combined size/weight of the smallest allowance or disable that option in your settings. (You cannot disable a carrier per item, but disable them in your settings)
With eBay they have introduced a new ‘simple delivery’ which is similar to Vinted - a Royal Mail or Evri label gets generated based on your suggestion
If you use that then you pick the expected size/weight range - eBay will charge the buyer and provide you with a label
I still prefer the classic ‘custom postage’ where I specify the postage methods and charge for postage (or show it as free post and take from the item price
(‘Free postage’ works sometimes for small/light/cheap items that may sell in multiples as that way I get to keep those extra pennies if sent in one package)
On Vinted you list a set price then decide if you’ll accept a lesser offer. On eBay you can do the same with a ‘buy now’ amount and offers enabled
Vinted charge their fees up front to the buyer, so you get the amount that you see
eBay historically charged fees from the sale fee, they went to zero fees for a while but have reintroduced them as an up front charge to the buyer. That means you get the amount from the sale but the buyer pays a slightly higher amount
Remember when setting your prices to check the small print displayed on what the buyer would pay in total to avoid out pricing yourself in comparison to others
For receiving your money, both Vinted and eBay will place a level of hold, particularly for new sellers. Bear this in mind when deciding on eBay postage in case you need the money to post it
A successfuly tracked delivery results in clearance which you can leave on both eBay & Vinted for a while and then withdraw
Vinted will hold funds until you transfer to your bank accout, eBay will hold funds for a period of time - weekly, fortnightly, monthly or you can withdraw on request
It’s no longer necessary to use fully tracked services, but if you generate a label within eBay (including ‘custom’) then the basic 2nd class m, 1st class etc still give a reference number but don’t require a signature etc
If selling at a higher value then do choose the right option for your needs.
If you buy postage at the counter then make sure you get an option that gives you a reference number - and add that to the sale page
I was using Vinted for clothes and eBay for other items, but I get less sales on Vinted, so I slowly change an item from Vinted to eBay every now and again
(the more active you are on whichever market place the better you may find it is, as every fresh listing is engaging and their algorithms make your items more likely to appear in searches / suggestions