HDEE that is actually not right, you only have seller protection if you can prove delivery if theythen claim not received, but it is perfectly reasonable to send things by standard post and take the risk
when you select postage on ebay you can offer anything from 2nd class standard to special delivery,
many sellers send standard second class on lower value items as sending items that cost 99p with 95p extra over and above normal postage ends up with low DSR for postage
for me as a business seller it is in the end about money, it makes more economic sense to personally refund the 1 in 100 or 150 parcels that go missing than lose 95p profit from each transaction
most people buy on total cost so if I get £10 in total, 2.20 in postage £1 ebay fees say 15p to list at £4.99 starting price, ( no free listings for business sellers) paypal fees at 54p, packing materials 20p ; so after costs I have £5.91 left to cover original purchase price and my profit
if I sell 100 items I have £591 if I charged everyone signed for postage I would only have £496; if out of 591 i have to refund 2 or even 5 people I would still be better off, more than 9 parcels would have to go missing ie 1 in 10 parcels to make signed for postage justifiable ( it would actually be still only break even)
i reckon less than 1% goes missing, as I sell mostly china probably 1-2% might break but I would still have to refund those whether signed for or not
so unless item is worth more than £25-30 going to Chile I do not used signed for
I would make an exception in certain categories like technology mobile phones etc where fraud is widespread
but sending a pair of pillowcases or a babygro that costs £1.50 signed for just seems ridiculous