Vinteds postage costs for delivery to home are far as I can see (they dont advertise them anywhere) are

up to 500g - Evri £2.99/RM £3.39

501g to 1kg - Evri £4.29/RM £5.09

1kg to 2kg - Evri £6.29/RM £6.59

So yes they do pay silly prices. They may have Inpost but given all the problems they have with couriers muddling up parcels, I wouldnt use them. They also have Yodel and DPD but the charges are the same as Evri.

What they dont have is the buyers penalty for the seller choosing only 1 courier but Vinted dont do RM collection from home.

And I use Vinted but Ive never been called young hip before, so thank you - Im in my 60s!