Use Amazon almost exclusively... altho' I price check against Ebay and occasionally Ebay wins, or some other online retailer..
I have Amazon Prime.. which is great value for me.. for an annual cost of ÂŁ95 per year, I get free deliveries on everything regardless of the size.. same day delivery on some items as well but mostly next day delivery..
I get access to over 30,000 movies which I can watch online.. or on any one of my devices.. ipad, phone..TV..
Get unlimited access to over 1,000 ebooks and magazines..
Access to Prime music... and lots of other things.. so for my ÂŁ7.91 per month.. I save on fuel and shoe leather going to the stores.. and while I'm waiting for my deliveries, I can choose to watch films, read books, and access music..

..win - win for me ..who orders a LOT from Amazon every year..
I used to sell a lot on Ebay, and began soon after it first appeared online as an Auction site .. and still occasionally buy if the item is cheaper on there.. but I stopped using it mainly when the odds were stacked against the seller.. and the fees also became too high. Now there's lots of other outlets to sell .. if one wishes to.. and many do..