$55 for ONE $20 card?
I'll sell you two anonymous VISA cards pre-loaded with $20 for that price, and still laugh about how much I'm making on my investment.
They can be reloaded, they are completely anonymous and the price includes registered post anywhere in the world, compared to the $40 postage and $40 card someone else is selling, this is a bargain. the price for more than one also drops considerably.
The only reason the "other" person's card is in high demand is because it can be reloaded with BTC. What you're selling is not all that significant, and can be picked up... anywhere.