I think you need to be 'savvy' when using Ebay. ......
Indeed. If ' it seems too good / cheap to be true ' something probably is not right be that a fake item or undisclosed fault. Always read the description and look at all the listing photographs - much easier on a PC/laptop than a phone.
eBay generally side with the buyer so limited risk but hassle to sort out, send return etc.
Postage costs for parcels is not an exact science on eBay. Some sellers will put a best guess price, some will put a lower price to make their listing more attractive but taking a hit on the costs, others will just blatantly inflate posted costs but may have a lower overall listing price.
Every time unless the listing is free postage essential to carefully check.
Some sellers always use say DHL or UPS not least for tracking and low risk hence £10 or so. Some combine postage whiles others do not.
Higher volume sellers I guess often have a contract with a standard price per item which they pass on. Hence a listing at a higher price can be less once carriage added. Business sellers who qualify for Royal Mail Tracked 48 get better prices than Signed For and less restrictions.
Watch out if delivery time is longer too - even if the listing states the item is in the UK in reality it may be bulk shipped from China, Hong Kong etc. Feedback for previous sales can be a clue to this.
Postage cost is included in the final value fee.
Has that always been the case? I could have sworn it wasn't previously, but it's been years and years since I last sold anything there and my memory's not the best
It used not to be but was included a while ago now, I think before they separated from Paypal and payments made to your bank account. There is no gain or penalty now for listing with free, or in reality inclusive, postage / shipping.
To not be out of pocket you need to add around 15% to your cost as well as your packaging costs. Even with recycled padded bags and boxes there is labelling and tape so IMO reasonable to add at least another 50p.
As a seller always send out with signature required so the buyer can not claim non-delivery - for Evri ( Hermes ) this adds 90p, for Royal Mail used signed for.
Loss / damage cover for Evri is just £20 and Royal Mail Signed For ( I think ) now £50.
For anything much more valuable, even if you take the risk beyond the basic insurance value, use DPD, DHL or UPS ( I think best of all ) as the risk is much lower.