Reliable place to make a PayPal sale?

[Lily]

I have concert tickets for a show in London in less than a week that I can't make it to. (I live in Scotland). Can't sell them on ebay as they no longer allow it (has to be through Stubhub which belongs to ebay). Stubhub has so many tickets on sale for the event and has overpriced my tickets to buyers to fill their own pockets, even though I'm willing to sell them at a fraction of what I paid. I listed them on gumtree in the hope someone local would buy them. I've had messages from people on London wishing to buy them but not realizing I'm away up in Scotland. I'd be willing to post them special next say delivery and take a payment through paypal, but I could never expect a buyer to put that trust in me...is there anywhere I could make the sale, like an ebay alternative where the buyer would feel protected?